A type of argumentative text found in research documents experiments and field reports

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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.

The answer is (a) 12-2(-1)(6)2(6)=12