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Trigonometry

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Moderate

Pythagorean Identity Involving the $\cot(\theta)$

TRIG-$EISKA

Which of the following is a Pythagorean Identity involving the $\cot(\theta)$?

A

$1 + \cot^{2}(\theta) = \csc^{2}(\theta)$

B

$1 - \cot^{2}(\theta) = \csc^{2}(\theta)$

C

$-1 + \cot^{2}(\theta) = \csc^{2}(\theta)$

D

$1 + \cot^{2}(\theta) = -\csc^{2}(\theta)$