Question

Given : cos 38° sec (90° − 2A) = 1; find the value of angle A.

Answer 1

Answer:

Explanation:

I think it goes like this:

Sec = 1/cos

cos 38 * 1/cos (90-2a) = 1

38(90-2a) = 1

3420 - 76a = 1

3420 = 76a

3420/76= a

45 = a!!

Answer 2

Explanation:

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