Which of the following is the same as 1500 x 15 x 5? A. 1500 x 10 x 55
3. 1000 + (500 x 75)

C. (1000 x 75) + (500 x 75)
D. (1500 x 15) + (1500 x'5)

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since the cosine is the ratio of the adjacent side to the hypotenuse, you can see that cos 60° = ½. answer. according to the property of cofunctions (topic 3), sin 30° is equal to cos 60°. sin 30° = ½.