QuestionThe cosine function for a specific angle in a triangle is defined by the ratio of the triangle's A) opposite side and adjacent side. B) adjacent side and opposite angle. C) opposite side and hypotenuse. D) adjacent side and hypotenuse.

Studdy Solution
Match the definition to the given options: - Option A: opposite side and adjacent side (incorrect, this is the tangent function). - Option B: adjacent side and opposite angle (incorrect, angles are not sides). - Option C: opposite side and hypotenuse (incorrect, this is the sine function). - Option D: adjacent side and hypotenuse (correct, this matches the definition of cosine).
The correct answer is $\boxed{D}$.