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sin 40^(@) - sin 80^(@)+ sin 160^(@)=...

`sin 40^(@) - sin 80^(@)+ sin 160^(@)`=

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Sin40^(@) - Sin80^(@) + Sin160^(@) =

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^(@).

Prove that sin10^(@) + sin20^(@) + sin 40^(@) + sin 50^(@) = sin 70^(@) + sin 80^(@)

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

sin 20^(@) sin 40^(@) sin 60^(@) sin 80^(@) = .............. A) (-3)/(16) B) (5)/(16) C) (3)/(16) D) (-5)/(16)

sin 20^(@) sin 40^(@) sin 60^(@) sin 80^(@) =(3)/(16)

sin 20^(@) * sin 40^(@) * sin 60^@ * sin 80^(@) =