How do you find the remaining trigonometric functions of $theta$ given $costheta=-2$ and $theta$ terminates in QII?

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Answer 1 · 2017-02-25T07:42:57

$costheta$ always lies in the interval $[-1,1}$ and hence it cannot be $-2$ and hence question does not arise.

How do you find the remaining trigonometric functions of thetatheta given costheta=-2costheta=-2 and thetatheta terminates in QII?