Question

In the first quadrant, the reference angle where cosine is 1/2 is π/3. In the fourth quadrant, the reference angle is 2π/3.

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Answer 1

[AI-generated answer — Bot GPT 3.5]

In the first quadrant, the angle where cosine equals 1/2 is 60 degrees. In the fourth quadrant, the angle is 120 degrees.