" 16."quad " (i) "sin40^(@)+sin75^(@)=cos15^(@)+cos50^(@)

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

4sin75^@-3cos15^@=

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

sin 10^(@)+sin 20^(@) + sin 40 ^(@) + sin 50 = A) sin 15^(@) +sin 75^(@) B) cos 15^(@) + cos75^(@) C) sin 70^(@) + sin 80^(@) D) cos 70^(@) + cos 80^(@)

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

Simplify (sin75^(@)-sin15^(@))/(cos75^(@)+cos15^(@))

Simplify (sin75^(@)-sin15^(@))/(cos75^(@)+cos15^(@))

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

Simplyify (sin75^(@)-sin15^(@))/(cos75^(@)+cos15^(@))