Question

If sinA = cos8A then SecA is equal to

Answer 1

Answer:

Step-by-step explanation:

Given,

sinA = cos8A

To Find :-

secA = ?

Solution :-

sinA = cos8A

We know that :-

sinx = cos(90 - x)

cos(90 - A) = cos8A

Cancelling 'cos' on both sides :-

90 - A = 8A

90 = 9A

A = 90/9 = 10°

secA = sec10°.