BSEB Class 10 Maths Chapter 8 Introduction to Trigonometry Ex 8.1 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 8 Introduction to Trigonometry Ex 8.1 Book Answers |
Bihar Board Class 10th Maths Chapter 8 Introduction to Trigonometry Ex 8.1 Textbooks Solutions PDF
Bihar Board STD 10th Maths Chapter 8 Introduction to Trigonometry Ex 8.1 Books Solutions with Answers are prepared and published by the Bihar Board Publishers. It is an autonomous organization to advise and assist qualitative improvements in school education. If you are in search of BSEB Class 10th Maths Chapter 8 Introduction to Trigonometry Ex 8.1 Books Answers Solutions, then you are in the right place. Here is a complete hub of Bihar Board Class 10th Maths Chapter 8 Introduction to Trigonometry Ex 8.1 solutions that are available here for free PDF downloads to help students for their adequate preparation. You can find all the subjects of Bihar Board STD 10th Maths Chapter 8 Introduction to Trigonometry Ex 8.1 Textbooks. These Bihar Board Class 10th Maths Chapter 8 Introduction to Trigonometry Ex 8.1 Textbooks Solutions English PDF will be helpful for effective education, and a maximum number of questions in exams are chosen from Bihar Board.Bihar Board Class 10th Maths Chapter 8 Introduction to Trigonometry Ex 8.1 Books Solutions
Board | BSEB |
Materials | Textbook Solutions/Guide |
Format | DOC/PDF |
Class | 10th |
Subject | Maths Chapter 8 Introduction to Trigonometry Ex 8.1 |
Chapters | All |
Provider | Hsslive |
How to download Bihar Board Class 10th Maths Chapter 8 Introduction to Trigonometry Ex 8.1 Textbook Solutions Answers PDF Online?
- Visit our website - Hsslive
- Click on the Bihar Board Class 10th Maths Chapter 8 Introduction to Trigonometry Ex 8.1 Answers.
- Look for your Bihar Board STD 10th Maths Chapter 8 Introduction to Trigonometry Ex 8.1 Textbooks PDF.
- Now download or read the Bihar Board Class 10th Maths Chapter 8 Introduction to Trigonometry Ex 8.1 Textbook Solutions for PDF Free.
BSEB Class 10th Maths Chapter 8 Introduction to Trigonometry Ex 8.1 Textbooks Solutions with Answer PDF Download
Find below the list of all BSEB Class 10th Maths Chapter 8 Introduction to Trigonometry Ex 8.1 Textbook Solutions for PDF’s for you to download and prepare for the upcoming exams:BSEB Bihar Board Class 10th Maths Solutions Chapter 8 Introduction to Trigonometry Ex 8.1
Question 1.
In ∆ ABC, right angled at B, AB = 24 cm, BC = 7 cm. Determine :
(i) sin A, cos A (ii) sin C, cos C
Solution:
Let us draw a right ∆ ABC.
By using the Pythagoras theorem, we have :
AC² = AB² + BC² = (24)² + (7)²
= 576 + 49 = 625
So, AC = 625‾‾‾‾√ cm = 25 cm
(i) sin A = 𝐵𝐶𝐴𝐶 = 725, cos A = 𝐴𝐵𝐴𝐶 = 2425
(ii) sin C = 𝐴𝐵𝐴𝐶 = 2425, cos C = 𝐵𝐶𝐴𝐶 = 725
Question 2.
In adjoining figure, find tan P – cot R.
Solution:
By using the Pythagoras theorem, we have :
PR² = PQ² + QR² or 13² = 12² + QR²
or QR² = 13² – 12² = 169 – 144 = 25
So, QR = 25‾‾‾√ cm = 5 cm
∴ tan P = 𝑄𝑃𝑃𝑄 = 512 and cot R = 𝑄𝑅𝑃𝑄 = 512
Hence, tan P – cot R = 512 – 512 = 0.
Question 3.
If sin A = 34, calculate cos A and tan A.
Solution:
Consider a ∆ ABC in which ∠B = 90°.
For ∠A, we have :
Base (adjacent side) = AB,
Perp. (opposite side) = BC
and Hyp. = AC.
Question 4.
Given 15 cot A =8, find sin A and sec A.
Solution:
Consider a ∆ ABC in which ∠B = 90°.
For ∠A, we have:
Base AB, Perp. = BC and Hyp. = AC.
Question 5.
Given sec θ = 1312, calculate all other trigonometric ratios.
Solution:
Consider a ∆ ABC in which ∠A = 0° and ∠B = 90° Then, Base = AB, Perp. = BC and Hyp. = AC.
Question 6.
If ∠A and ∠B are acute angles such that cos A = cos B, then show that ∠A = ∠B.
Solution:
Let us consider two right triangles PQA and RSB in which cos A = cos B (see the figure).
We have:
cos A = 𝑄𝐴𝑃𝐴
and cos B = 𝑆𝐵𝑅𝐵
Thus, it is given that
𝑄𝐴𝑃𝐴 = 𝑆𝐵𝑅𝐵
so, 𝑄𝐴𝑆𝐵 = 𝑃𝐴𝑅𝐵 = K(say) … (1)
Now, by Pythagoras Theorem,
Therefore, from (1) and (2), we have
𝑄𝐴𝑆𝐵 = 𝑃𝐴𝑅𝐵 = 𝑃𝑄𝑅𝑆
Hence, ∆ PQA ~ ∆ RSB [SSS similarity]
Therefore, ∠A = ∠B [Corresponding angles]
Question 7.
If cot θ = 78, evaluate :
(i) (1+sin𝜃)(1−sin𝜃)(1+cos𝜃)(1−cos𝜃)
(ii) cot² θ
Solution:
Consider a ∆ ABC in which ∠A = 0 and ∠B = 90°.
Then, Base = AB, Perp = BC and Hyp = AC
∴ cot θ = 𝐵𝑎𝑠𝑒𝑃𝑒𝑟𝑝 = 𝐴𝐵𝐵𝐶 = 78
Let AB = 7k and BC = 8k
Question 8.
If 3 cot A = 4, check whether 1−tan2𝐴1+tan2𝐴 = cos² A – sin² A or not.
Solution:
Consider a ∆ ABC in which ∠B = 90°.
Foe ∠A, we have:
Base = AB, Perp = BC and Hyp = AC
∴ cot A = 𝐵𝑎𝑠𝑒𝑃𝑒𝑟𝑝 = 𝐴𝐵𝐵𝐶 = 43
Let AB = 4k and BC = 3k [3 cot A = 4 ⇒ cot A = 43 ]
Question 9.
In ∆ ABC right angled at B, if tan A = 13√, find the value of
(i) sin A cos C + cos A sin C
(ii) cos A cos C – sin A sin C
Solution:
Consider a ∆ ABC, in which ∠B = 90°
For ∠A, we have :
Base = AB,
Perp. = BC .
and Hyp. = AC
∴ tan A = 𝑃𝑒𝑟𝑝𝐵𝑎𝑠𝑒 = 𝐵𝐶𝐴𝐵 = 13√
Let BC = k and AB = 3‾√k.
(i) sin A cos C + cos A sin C = 12 x 12 + 3√2 x 3√2
= 14 x 34 = 44 = 1
(ii) cos A cos C – sin A sin C = 3√2 x 12 – 12 3√2 = 0
Question 10
In ∆ PQR, right angled at Q, PR + QR = 25 cm and PQ = 5 cm. Determine the values of sin P, cos P and tan P.
Solution:
In ∆ PQR, right ∠d at Q,
PR + QR = 25 cm and PQ = 5 cm.
Let QR = x cm
∴ PR = (25 – x) cm
By Pythagoras theorem, we have :
NJ). IUIJY MA’l’
RP² = RQ² + QP²
So, (25 – x)² = x² + 5²
or 625 – 50x + x² = x² + 25
or – 50x = – 600 or x = −600−50 = 12
∴ RQ = 12cm
So, RP = (25 – 12)cm = 13 cm
Now, sin P = 𝑅𝑄𝑅𝑃 = 1213
cos P = 𝑃𝑄𝑅𝑃 = 513
and, tan P = 𝑅𝑄𝑃𝑄 = 125
Question 11.
State whether the following are true or false. Justify your answer.
- The value of tan A is always less than 1.
- sec A = 125 for some value of angle A.
- cos A is the abbreviation used for the cosecant of angle A.
- cot A is the product of cot and A.
- sin θ = 43 for some angle θ.
Solution:
- False because sides of a right triangle may have any length, so tan A may have any value.
- True as sec A is always greater than or equal to 1.
- False as cos A is the abbreviation used for cosine A.
- False as cot A is not the product of ‘cot’ and A. ‘cot separated from A has no meaning.
- False as sin 0 cannot be > 1.
BSEB Textbook Solutions PDF for Class 10th
- BSEB Class 10 Textbook Solutions PDF: Download Bihar Board STD 10th Book Answers
- BSEB Class 10 Maths Textbook Solutions PDF: Download Bihar Board STD 10th Maths Book Answers
- BSEB Class 10 Maths Chapter 1 Real Numbers Ex 1.1 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 1 Real Numbers Ex 1.1 Book Answers
- BSEB Class 10 Maths Chapter 1 Real Numbers Ex 1.2 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 1 Real Numbers Ex 1.2 Book Answers
- BSEB Class 10 Maths Chapter 1 Real Numbers Ex 1.3 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 1 Real Numbers Ex 1.3 Book Answers
- BSEB Class 10 Maths Chapter 1 Real Numbers Ex 1.4 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 1 Real Numbers Ex 1.4 Book Answers
- BSEB Class 10 Maths Chapter 2 Polynomials Ex 2.1 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 2 Polynomials Ex 2.1 Book Answers
- BSEB Class 10 Maths Chapter 2 Polynomials Ex 2.2 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 2 Polynomials Ex 2.2 Book Answers
- BSEB Class 10 Maths Chapter 2 Polynomials Ex 2.3 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 2 Polynomials Ex 2.3 Book Answers
- BSEB Class 10 Maths Chapter 2 Polynomials Ex 2.4 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 2 Polynomials Ex 2.4 Book Answers
- BSEB Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.1 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.1 Book Answers
- BSEB Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.2 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.2 Book Answers
- BSEB Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.3 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.3 Book Answers
- BSEB Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.4 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.4 Book Answers
- BSEB Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.5 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.5 Book Answers
- BSEB Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.6 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.6 Book Answers
- BSEB Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.7 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.7 Book Answers
- BSEB Class 10 Maths Chapter 4 Quadratic Equations Ex 4.1 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 4 Quadratic Equations Ex 4.1 Book Answers
- BSEB Class 10 Maths Chapter 4 Quadratic Equations Ex 4.2 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 4 Quadratic Equations Ex 4.2 Book Answers
- BSEB Class 10 Maths Chapter 4 Quadratic Equations Ex 4.3 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 4 Quadratic Equations Ex 4.3 Book Answers
- BSEB Class 10 Maths Chapter 4 Quadratic Equations Ex 4.4 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 4 Quadratic Equations Ex 4.4 Book Answers
- BSEB Class 10 Maths Chapter 5 Arithmetic Progressions Ex 5.1 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 5 Arithmetic Progressions Ex 5.1 Book Answers
- BSEB Class 10 Maths Chapter 5 Arithmetic Progressions Ex 5.2 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 5 Arithmetic Progressions Ex 5.2 Book Answers
- BSEB Class 10 Maths Chapter 5 Arithmetic Progressions Ex 5.3 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 5 Arithmetic Progressions Ex 5.3 Book Answers
- BSEB Class 10 Maths Chapter 5 Arithmetic Progressions Ex 5.4 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 5 Arithmetic Progressions Ex 5.4 Book Answers
- BSEB Class 10 Maths Chapter 6 Triangles Ex 6.1 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 6 Triangles Ex 6.1 Book Answers
- BSEB Class 10 Maths Chapter 6 Triangles Ex 6.2 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 6 Triangles Ex 6.2 Book Answers
- BSEB Class 10 Maths Chapter 6 Triangles Ex 6.3 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 6 Triangles Ex 6.3 Book Answers
- BSEB Class 10 Maths Chapter 6 Triangles Ex 6.4 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 6 Triangles Ex 6.4 Book Answers
- BSEB Class 10 Maths Chapter 6 Triangles Ex 6.5 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 6 Triangles Ex 6.5 Book Answers
- BSEB Class 10 Maths Chapter 6 Triangles Ex 6.6 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 6 Triangles Ex 6.6 Book Answers
- BSEB Class 10 Maths Chapter 7 Coordinate Geometry Ex 7.1 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 7 Coordinate Geometry Ex 7.1 Book Answers
- BSEB Class 10 Maths Chapter 7 Coordinate Geometry Ex 7.2 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 7 Coordinate Geometry Ex 7.2 Book Answers
- BSEB Class 10 Maths Chapter 7 Coordinate Geometry Ex 7.3 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 7 Coordinate Geometry Ex 7.3 Book Answers
- BSEB Class 10 Maths Chapter 7 Coordinate Geometry Ex 7.4 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 7 Coordinate Geometry Ex 7.4 Book Answers
- BSEB Class 10 Maths Chapter 8 Introduction to Trigonometry Ex 8.1 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 8 Introduction to Trigonometry Ex 8.1 Book Answers
- BSEB Class 10 Maths Chapter 8 Introduction to Trigonometry Ex 8.2 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 8 Introduction to Trigonometry Ex 8.2 Book Answers
- BSEB Class 10 Maths Chapter 8 Introduction to Trigonometry Ex 8.3 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 8 Introduction to Trigonometry Ex 8.3 Book Answers
- BSEB Class 10 Maths Chapter 8 Introduction to Trigonometry Ex 8.4 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 8 Introduction to Trigonometry Ex 8.4 Book Answers
- BSEB Class 10 Maths Chapter 9 Some Applications of Trigonometry Ex 9.1 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 9 Some Applications of Trigonometry Ex 9.1 Book Answers
- BSEB Class 10 Maths Chapter 10 Circles Ex 10.1 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 10 Circles Ex 10.1 Book Answers
- BSEB Class 10 Maths Chapter 10 Circles Ex 10.2 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 10 Circles Ex 10.2 Book Answers
- BSEB Class 10 Maths Chapter 11 Constructions Ex 11.1 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 11 Constructions Ex 11.1 Book Answers
- BSEB Class 10 Maths Chapter 11 Constructions Ex 11.2 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 11 Constructions Ex 11.2 Book Answers
- BSEB Class 10 Maths Chapter 12 Areas Related to Circles Ex 12.1 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 12 Areas Related to Circles Ex 12.1 Book Answers
- BSEB Class 10 Maths Chapter 12 Areas Related to Circles Ex 12.2 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 12 Areas Related to Circles Ex 12.2 Book Answers
- BSEB Class 10 Maths Chapter 12 Areas Related to Circles Ex 12.3 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 12 Areas Related to Circles Ex 12.3 Book Answers
- BSEB Class 10 Maths Chapter 13 Surface Areas and Volumes Ex 13.1 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 13 Surface Areas and Volumes Ex 13.1 Book Answers
- BSEB Class 10 Maths Chapter 13 Surface Areas and Volumes Ex 13.2 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 13 Surface Areas and Volumes Ex 13.2 Book Answers
- BSEB Class 10 Maths Chapter 13 Surface Areas and Volumes Ex 13.3 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 13 Surface Areas and Volumes Ex 13.3 Book Answers
- BSEB Class 10 Maths Chapter 13 Surface Areas and Volumes Ex 13.4 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 13 Surface Areas and Volumes Ex 13.4 Book Answers
- BSEB Class 10 Maths Chapter 13 Surface Areas and Volumes Ex 13.5 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 13 Surface Areas and Volumes Ex 13.5 Book Answers
- BSEB Class 10 Maths Chapter 14 Statistics Ex 14.1 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 14 Statistics Ex 14.1 Book Answers
- BSEB Class 10 Maths Chapter 14 Statistics Ex 14.2 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 14 Statistics Ex 14.2 Book Answers
- BSEB Class 10 Maths Chapter 14 Statistics Ex 14.3 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 14 Statistics Ex 14.3 Book Answers
- BSEB Class 10 Maths Chapter 14 Statistics Ex 14.4 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 14 Statistics Ex 14.4 Book Answers
- BSEB Class 10 Maths Chapter 15 Probability Ex 15.1 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 15 Probability Ex 15.1 Book Answers
- BSEB Class 10 Maths Chapter 15 Probability Ex 15.2 Textbook Solutions PDF: Download Bihar Board STD 10th Maths Chapter 15 Probability Ex 15.2 Book Answers
0 Comments:
Post a Comment