" (v) "1+(cos105^(@)+cos165^(@))/(sin105^(@)+sin375^(@))=0

Prove that 1 + (cos105^(@) + cos 165^(@))/(sin 105^(@) + sin 375^(@))= 0

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

sin105^(@)+cos105^(@)=

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

Prove that, cos105^(@)+cos15^(@)=sin75^(@)-sin15^(@)

cos 15^@+ cos 105^@ =?

cos 225^(@)+ sin 165^(@)=

Prove that : (i) "sin"105^(@)+cos105^(@)=(1)/(sqrt(2)) (ii) cos105^(@)+cos15^(@)="sin"75^(@)-"sin"15^(@)

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

sin15^@+cos105^@=