Question Number 58175 by mamah Fousséni last updated on 19/Apr/19
$$\mathrm{The}\:\mathrm{value}\:\mathrm{of}\:\mathrm{sin}\left(\pi+\theta\right)\:\mathrm{sin}\left(\pi−\theta\right)\:\mathrm{cosec}^{\mathrm{2}} \theta \\ $$$$\mathrm{is}\:\mathrm{equal}\:\mathrm{to} \\ $$
Answered by math1967 last updated on 19/Apr/19
$$−{sin}\theta×{sin}\theta×{cosec}^{\mathrm{2}} \theta=−\mathrm{1} \\ $$$$ \\ $$