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" 19) "cos6^(@).sin24^(@).cos72^(@)=*...

" 19) "cos6^(@).sin24^(@).cos72^(@)=*

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cos 6^(@) sin 24^(@) cos 72^(@) =

cos36^(@)-cos72^(@)=

What is the values of the following? ( sin 24^(@) +cos 66^(@)) (sin 24^(@) -cos66^(@))

cos 12 ^(@) cos 24 ^(@) cos 36 ^(@) cos 48^(@) cos 72^(@) cos 84^(@) = (1)/(2 ^(6))

Prove that 4cos12^(@)cos48^(@)cos72^(@)=cos36^(@)

Prove that 4cos12^(@)cos48^(@)cos72^(@)=cos36^(@) .

The value of cos12^(@)cos24^(@)cos36^(@)cos48^(@)cos72^(@)cos84^(@), is

The value of cos12^(@)cos24^(@)cos36^(@)cos48^(@)cos72^(@)cos84^(@), is

Evaluate : ((cos65^(@)sin18^(@)cos58^(@)))/((cos72^(@)sin25^(@)sin32^(@)))