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An angle in [0, π] has secant -2. That angle is
A-π/3
B-2π/3
Cπ/3
D2π/3
Answer & Solution
Correct answer: D. 2π/3
cos(2π/3) = -1/2, so sec(2π/3) = -2, and 2π/3 lies in [0, π] excluding π/2.
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