The square roots of 64 are and because 8 times 8 equals 64 and (minus 8)(minus 8)equals 64.

The square roots of 64 are​ __8 and​ -8 because 8 times 8 equals 64 and ​(minus 8​)(minus 8​)equals 64.

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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.