alleryCosine is the ratio of the hypotenuse and which side?
AThe average side
BThe adjacent side
CThe apparent side
DThe angular side
Answer & Solution
Correct answer: B. The adjacent side
1. Sine uses the opposite side.
2. Cosine uses the other leg of the triangle.
3. Find the cosine as the ratio of the adjacent side to the hypotenuse.
4. So the answer is the adjacent side.
_Source: OpenStax 'Algebra and Trigonometry 2e', Ch 7 'The Unit Circle: Sine and Cosine Functions'_
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