Answers Precalculus Trigonometric Sum Identities — Cumulative examQuestion 4

4

RCMultiple Choice

Trigonometric Sum Identities — Cumulative exam

Question 4 • Precalculus

What is the solution of ?

Question illustration

Answer

A

–1 < x < 1 or

Option A

B

–1 < x < 1 or

Option B

C

x < –1 or

Option C

D

x < –1 or

Option D

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