The high temp today was 62 degrees when nighttime comes ,the temp will drop 40 degrees. by am the temp will drop an additional 40 degrees .what is the temp at 4 am?

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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.

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