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If the sin 90° is 1, then the cos ____ °= _____. 90° ; 1 over 2 0° ; square root 2 over 2 90° ; square root 3 over 2 0° ; 1

James Washington

in Mathematics

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Chelsea Hayes on April 5, 2018

IF we try to be the first choice, cos (90) is equal to 1 and 1/2 not. The first option is, then it is not true. Cosine of 0 is not the square root of 2 over 2, but instead of 1. The second option is, then it is not true. From the first election we know that the cosine of 90 is 1, and not the square root of 3 over 2. We have the last choice to be the answer. In fact, the cosine of zero is 1.


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