alleryPositive reference angles have terminal sides lying in which quadrant?
AThe first
BThe fourth
CThe third
DThe second
Answer & Solution
Correct answer: A. The first
1. Reference angles are acute and positive.
2. That places them where both coordinates are positive.
3. Positive reference angles have terminal sides that lie in the first quadrant.
4. They model angles in other quadrants.
_Source: OpenStax 'Algebra and Trigonometry 2e', Ch 7 'The Unit Circle: Sine and Cosine Functions'_
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