[[15^(@)+cos105^(@)=],[0],[" (b) "2sin15^(@)],[" (c) "cos15^(@)+sin15^(@)],[" (d) "sin15^(@)-cos15^(@)]]

sin15^(@)+cos105^(@)=?

|["cos"15^(@), "sin"15^(@)], ["sin"15^(@), "cos"15^(@)]|=?

Evaluate det[[cos15^(@),sin15^(@)sin75^(@),cos75^(@)]]

Evalute |(cos 15^(@) sin 15^(@)),(sin 75^(@) cos 75^(@))|

sin 15^(@) + cos 105 ^(@) = ............ A) 0 B) 2 sin 15 ^(@) C) cos 15^(@) + sin 15^(@) D) sin 15^(@) - cos 15^(@)

sin 15^(@) + cos 105 ^(@) =

Evaluate |(cos 15^(@),sin15^(@)),(sin75^(@),cos75^(@))|

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

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