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" in "78^(@)-sin18^(@)+sin30^(@)-sin42^(...

" in "78^(@)-sin18^(@)+sin30^(@)-sin42^(@)

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Find the value: sin 78^(@) - sin18^(@) + sin 30^(@) - sin42^(@)

Prove that sin 12^(@) sin18^(@)sin42^(@) sin48^(@) sin 72^(@) sin78^(@)=(cos18^(@))/(32) .

Prove that sin 12^(@) sin18^(@)sin42^(@) sin48^(@) sin 72^(@) sin78^(@)=(cos18^(@))/(32) .

Prove that sin 12^(@) sin18^(@)sin42^(@) sin48^(@) sin 72^(@) sin78^(@)=(cos18^(@))/(32) .

sin78^(@)-sin66^(@)-sin42^(@)+sin6^(@) is

sin30^(@)+sin60^(@)+sin90^(@)+sin120^(@)

value of sin10^(@)sin30^(@)sin50^(@)sin70^(@)

sin 10^(@) sin 30^(@) sin 50^(@) sin 70^(@) sin 90^(@)=

sin6^(@)sin42^(@)sin66^(@)sin78^(@)=