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Question Number 95597 by bagjamath last updated on 26/May/20

$$\mathrm{The}\mathrm{value}\mathrm{of}$$$${\mathrm{cosec}}^2\frac{\pi }{7}+{\mathrm{cosec}}^2\frac{2\pi }{7}+{\mathrm{cosec}}^2\frac{3\pi }{7}\mathrm{is}$$

Commented by MJS last updated on 26/May/20

$$8$$

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