Question

Cos (A+18)° = Sin(20 - A) What is the Value of A?​

Answer 1

Answer:

I hope it helps you........

Answer 2

Answer:

$\cos( \alpha + 18 ) = \sin(20 - \alpha) \\ \sin(90 - ( \alpha + 18) ) = \sin(20 - \alpha) \\ 72 - \alpha = 20 - \alpha$

so no value of A is possible

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