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题目
题目

MHF4U - Advanced Functions 12 (2025-26) - A

单项选择题

Solve the equation:2cos(x) +1 = 0for all values of . Select the correct set of solutions.

选项
A.a. x = π/3, 5π/3
B.b. x = 2π/3, 4π/3
C.c. x = 5π/6, 7π/6
D.d. x = π/6, 11π/6
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标准答案
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思路分析
The equation to solve is 2 cos(x) + 1 = 0. First, isolate cos(x): 2 cos(x) = -1, so cos(x) = -1/2. We seek all x in the interval [0, 2π) such that the cosine equal......Login to view full explanation

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