`arcsin(sqrt(2)/2)` Evaluate the expression without using a calculator.

Textbook Question

Chapter 4, 4.7 - Problem 16 - Precalculus (3rd Edition, Ron Larson).
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loves2learn | (Level 3) Salutatorian

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You need to find value for which sin equals `sqrt2/2 ` . Using a unit circle, it can be determined that the answer is `pi/4 `

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