28- In - ABC if cot- - cotA - cotB - cotC then sin-A- - sin-B- - sin-C- - -

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Composition of Trigonometric Functions and Inverse Trigonometric Functions

28. In Δ ABC ...

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28. In Δ ABC if cotß = cotA + cotB + cotC then sin(A-ß) . sin(B-ß) . sin(C-ß) = ………

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