sin21^(0)cos9^(0)-cos84^(@)cos6^(@)=

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Prove that sin21^(@)cos9^(@)-cos84^(@)cos6^(@)=1/4 .

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^(@)=

If cos56^(0)+cos58^(0)-cos66^(0)-4cos28^(0)-cos29^(@)sin33^(@)=lambda then |2 lambda|=

Evaluate the following: sin36^(@)cos9^(0)+cos36^(@)sin9^(0)

The value of cos12^(0)+cos84^(0)+cos156^(@)+cos132^(@)is

" Prove that "(cos9^(0)+sin9^(0))/(cos9^(0)-sin9^(0))=cot36^(@)

Find the value of cos12^(0)+cos84^(@)+cos156^(@)+cos132^(@)