Math, asked by shubhamkumar8677, 8 months ago

prove that : Given question

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Answered by PritiPareshSalve

0

Answer:

sin10°sin30°sin50°sin70°

⟹cos80°cos60°cos40°cos20°

⟹12(cos20°cos40°cos80°)

⟹12(2sin20°cos20°)cos40°cos80°2sin20°

⟹14(2sin40°cos40°)cos80°2sin20°

⟹182sin80°cos80°2sin20°

⟹116sin160°sin20°

sin(180°−θ)=sinθ

⟹sin10°sin30°sin50°sin70°=116

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