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How do you find the value of $cot 90$ $cot 90$ ?

1 Answer

Jul 25, 2015

Find cot (90).
Ans: zero

Explanation:

On the trig unit circle, cot (90) = 0

Prove another way:
$cot x = \frac{cos x}{sin x}$ $cot x = cos x /sin x$
$cos (90) = 0$ $cos (90) = 0$ , therefor cot (90) = 0.#

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