Gigi did 85 sit-ups in 2 minutes, 50 seconds. Sam did 32 sit-ups in 48 seconds. Who did sit-ups at a faster rate?

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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.