`4\ sin23^(@)sin37^(@)sin83^(@)=`

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

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

sin1 2^(@)sin4 8^(@)sin5 4^(@)=

Prove that sin19^(@) + sin41^(@) + sin83^(@) = sin23^(@) + sin37^(@) + sin79^(@)

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

"Show that "sin^(2)16^(@)+sin^(2)23^(@)+sin^(2)37^(@)+sin^(2)44^(0)=1+sin^(2)7^(0)+sin^(2)14^(@)

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

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

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

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