Question

9)If sinA - COSA=0, Find the value of COSA​

Answer 1

sin A - cos A = 0

sin A = cos A

sin A = sin ( 90 - A)

A = 90 - A

2 A = 90

A = 45°

Answer 2

`(\pi)/(4) + k\pi`

Where k is from Z

Explanation:

We know that sin(A) = cos(A) are equal in 45° + k*180°