4sin23^(@)sin37^(@)sin83^(@)=cos21^(@)

Prove the following identities : 4 sin 23^(@) sin37^(@) sin 83^(@) = cos21^(@)

4backslash sin23^(@)sin37^(@)sin83^(@)=

Value of (2sin9^(@)sin 21^(@)sin 39^(@)sin 51^(@)cos21^(@)sin 81^(@))/(sin54^(@)) is equal to:-

Value of (2sin9^(@)sin 21^(@)sin 39^(@)sin 51^(@)cos21^(@)sin 81^(@))/(sin54^(@)) is equal to:-

(sin2^(@)+sin4^(@)+sin6^(@)+sin8^(@))/(cos1^(@)*cos2^(@)*cos5^(@))=

(4sin9^(@)sin21^(@)sin39^(@)sin51^(@)sin69^(@)sin81^(@))/(sin54^(@))

(4sin9^(@)sin21^(@)sin39^(@)sin51^(@)sin69^(@)sin81^(@))/(sin54^(@))

(4sin9^(@)sin21^(@)sin39^(@)sin51^(@)sin69^(@)sin81^(@))/(sin54^(@))

cos51^(@)-sin39^(@)+sin37^(@)-cos53^(@)=?

The value of (sin 20^(@)cos70^(@)+ cos20^(@)sin70^(@))/(sin23^(@)"cosec"23^(@)+cos23^(@)sec23^(@)) is _________.