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Question Number 149137 by mathdanisur last updated on 03/Aug/21

$$ifctg\mathit{\alpha }=-2and\frac{3\pi }{2}<\alpha <2\pi$$ $$findsin\mathit{\alpha }=?$$

Commented byliberty last updated on 03/Aug/21

$$\sin \alpha =-\frac{1}{\sqrt{5}}$$

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