Math, asked by kunalkuldeep128, 8 months ago

ncert class 10 maths chapter 8 exercise 8.4​

Answers

Answered by cdevharine2006
7

Answer:

Express the trigonometric ratios sin A, sec A and tan A in terms of cot A. Solution:

In photo

Ex 8.4 Class 10 Maths Question 2.

Write all the other trigonometric ratios of ∠A in terms of sec A. Solution:

In photo

Ex 8.4 Class 10 Maths Question 3.

Evaluate: Solution:

Ex 8.4 Class 10 Maths Question 4.

Choose the correct option. Justify your choice.

(i) 9 sec² A – 9 tan² A = ……

(A) 1. B) 9. C) 8. D) 0

(ii) (1 + tan θ + sec θ) (1 + cot θ – cosec θ) = ………..

(A) 0. (B) 1. (C) 2. (D) -1

(iii) (sec A + tan A) (1 – sin A) = ………….

(A) sec A. (B) sin A. (C) cosec A. (D) cos A

(iv) [latex s=2]\frac { 1+{ tan }^{ 2 }A }{ 1+cot^{ 2 }A }[/latex] = ………..

(A) sec² A. (B) -1. (C) cot² A. (D) tan² A

Solution:

In photo

Ex 8.4 Class 10 Maths Question 5.

Prove the following identities, where the angles involved are acute angles for which the expressions are defined.

Solution: in photo

Attachments:
Answered by dhruvgarg01230
0

Answer:

(cosec A -sinA ) (secA- cosA) =1/ tanA + cotA

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