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In standard position, the initial side extends along which axis?
ANegative y axis
BPositive x axis
CPositive y axis
DNegative x axis
Answer & Solution
Correct answer: B. Positive x axis
1. Standard position fixes both the vertex and a starting ray.
2. That ray points to the right.
3. Its initial side extends along the positive x axis.
4. So the answer is the positive x axis.
_Source: OpenStax 'Algebra and Trigonometry 2e', Ch 7 'The Unit Circle: Sine and Cosine Functions'_
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