Question: If + + = 180 and cot = cot + cot + cot 0 < < 90 show that sin 3

If α + β + ϒ= 180° and cot θ = cotα + cotβ + cotϒ 0 < θ < 90° show that sin3 θ = sin(α − θ) sin(β − θ) sin(ϒ − θ).

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