Answers 25-26 KCS21 Precalculus IC Cumulative Exam — Cumulative examQuestion 7

7

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Question 7 • *25-26 KCS21 Precalculus IC

Let sin(2x) = cos(x), where 0° ≤ x < 180°. What are the possible values for x?

Answer

A

30° only

B

90° only

C

30° or 150°

D

30°, 90°, or 150°

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