alleryAn angle whose terminal side lies on an axis is called a:
AQuadruple angle
BQuadrature angle
CQuadrantal angle
DQuadratic angle
Answer & Solution
Correct answer: C. Quadrantal angle
1. Most terminal sides land inside a quadrant.
2. Some land exactly on the boundary.
3. An angle is a quadrantal angle if its terminal side lies on an axis.
4. So the answer is a quadrantal angle.
_Source: OpenStax 'Algebra and Trigonometry 2e', Ch 7 'The Unit Circle: Sine and Cosine Functions'_
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