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Evaluate cot 45° without using a calculator by using ratios in a reference triangle.

Ronald Miller

in Mathematics

1 answer

1 answer

Mindee Nelson on November 22, 2018

Since we are looking for , we have to use a triangle. In a reference triangle, the legs are both , and the hypotenuse is . The function cotangent, so we are looking for the adjacent side divided by the opposite side of one of the angles. Both the adjacent and the opposite sides are the legs, regardless of the angle that you choose, so that we have the answer.

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