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Question Number 58175 by mamah Fousséni last updated on 19/Apr/19

$$\mathrm{The}\mathrm{value}\mathrm{of}\sin (\pi +\theta )\sin (\pi -\theta ){\mathrm{cosec}}^2\theta$$$$\mathrm{is}\mathrm{equal}\mathrm{to}$$

Answered by math1967 last updated on 19/Apr/19

$$-sin\theta \times sin\theta \times {cosec}^2\theta =-1$$$$$$

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