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13 8 sin 20° sin 40° sin 80º =...

13 8 sin 20° sin 40° sin 80º =

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Prove that sin 10° + sin 20° + sin 40° + sin 50°=sin 70° + sin 80

Prove that sin 10° + sin 20° + sin 40° + sin 50°=sin 70° + sin 80

sin20sin40sin80

Prove that sin 20^(@) sin 40^(@) sin 80^(@) = (sqrt3)/(8).

Prove the following : sin 10^@ + sin 20^@ + sin 40^@ + sin 50^@ = sin 70^@+ sin 80^@ .

Prove that sin 20^@ sin 40^@ sin 60^@ sin 80^@=3/16 .

Prove the following : sin 20^@ sin 40^@ sin 60^@ sin 80^@ = 3/16 .

Find the value of sin 20^@ sin 40^@sin 80^@