A. `sin78^@ - sin18^@ + cos132^@ ,B =cos12^@+cos84^@ + cos132^@ +cos 156^@` and `C=(sin 75^@ + sin 15^@)/(cos 75^@ + cos 15^@)` then arrang in the ascending order

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

cos 12^@ + cos 84^@ + cos 132^(@) + cos 156^(@)=

sin 78^(@) - sin 18^(@) + cos 132^(@) =

( sin 75^(@) - sin 15^(@))/( cos 15^(@) - cos 75^(@))=

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

Simplify (sin 75^(@)-sin 15^(@))/(cos 75^(@)+cos 15^(@))

sin75^(@)-sin15^(@)=cos105^(@)+cos15^(@)

sin15^@cos75^@+cos^(2)15^@=

Prove that sin 75^(@) - sin 15^(@) = cos 105^(@) + cos 15^(@)