`(i) cos75^@ (ii)cos15^@`

(i) cos 15^@ (ii) cos75^@ (iii) tan15^@ (iv)tan75^@

Find the values of the following: (i) sin75^(@) (ii) cos15^(@)

Find the values of the following: sin75^0 (ii) cos75^0 (iii) sin15^0 (iv) cos15^0

Find the value of (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

cos15^(@)+cos105^(@)=

4sin75^@-3cos15^@=

cos 15^@+ cos 105^@ =?

cos15^(@)-cos75^(@)=