AnswersPrecalculusTrigonometric Sum Identities — Cumulative examQuestion 4
4
RCMultiple Choice

Trigonometric Sum Identities — Cumulative exam

Question 4 of 49 • 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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