College Math CLEP Prep Practice Exam

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Unlock your mathematical potential and conquer the College Math CLEP exam with ease! Introducing our powerful College Math CLEP Prep Practice Exam, your ultimate tool for exam readiness.

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What is cos(60°)?

0.5
0.866
-0.5
-0.866

The correct answer is: 0.866

Cosine is a trigonometric function that represents the ratio of the adjacent side to the hypotenuse in a right triangle. The angle given in the question, 60°, is commonly known as part of a special triangle, the 30-60-90 triangle. In this triangle, the ratio of the adjacent side to the hypotenuse is 12, or 0.5. However, the question is asking for the cosine function, which takes into account the negative values of angles in the second and third quadrants. Therefore, the correct answer is 0.866 or -0.866, depending on which quadrant the angle is in. Option A and C, 0.5 and -0.5 respectively, are incorrect because they do not take into consideration the negative values in the third and second quadrants. Option D, -0.866