Question

find the value of angle A : 0° ≤ A ≤ 90°. cos (90° - A). sec 42° = 1​

Answer 1

Step-by-step explanation:

cos(90-A).sec42=1

cos(90-A)/cos42=1

we can say

90-A=42

A=90-42=48

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Answer 2

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