Please solve RD Sharma Chapter Inverse trigonometric functions exercise 3.8 question 2 sub question (ii) maths text book solution
Hint:
We convert in the form of and we know the formula of it.
Given:
We have to prove
Solution:
LHS =
Let’s suppose that and
.
Here, we only have and
.So we have to find
and
.
Let, in , angle
and right angle at B.
Let, in , angle
and right angle at B.
[we will ignore the -ve sign because PR is a length and it can’t be -ve]