sin21^(@)cos9^(@)-cos84^(@)cos6^(@)

(The24^(@)cos6^(@)-sin6^(@)sin66^(@))/(sin21^(@)cos39^(@)-cos51^(@)sin69^(@)) is

The value of (sin24^(@)cos6^(@)-sin6^(@)sin66^(@))/(sin21^(@)cos39^(@)-cos51^(@)sin69^(@)) is

sin 21^(@) cos 9^(@) - cos 84^(@) cos 6^(@)=

cos12^(@)+cos60^(@)+cos84^(@)=cos24^(@)+cos48

cos12^(@)cos24^(@)cos48^(@)cos84^(@)

cos9^(@)-sin9^(@)=

A=sin78^(@)-sin18^(@)+cos132^(@) B=cos12^(@)+cos84^(@)+cos132^(@)+cos156^(@) and C=(sin 75^(@)+sin 15^(@))/(cos 75^(@)+cos 15^(@)) then arrange in the ascending order

A.78^(@)-sin18^(@)+cos132^(@),B=cos12^(@)+cos84^(@)+cos132^(@)+cos156^(@) and C=(sin75^(@)+sin15^(@))/(cos75^(@)+cos15^(@)) then arrang in the ascending order

Prove that (cos9^(@)+sin9^(@))/(cos9^(@)-sin9^(@))=cot36^(@)

cos12^(@)+cos84^(@)+cos132^(@)+cos156^(@)=