Question

 Use the subtraction formula for sine to verify this identity

Answer 1

\[\sin \left( a-b \right)=\sin a \cos b-\cos a \sin b\]

Answer 2

@sshayer
sin pi/2cosx-cos pi/2 sinx

Answer 3

I can't simplify further

Answer 4

\[\sin \frac{ \pi }{ 2 }=1,\cos \frac{ \pi }{ 2 }=0\]

Answer 5

what is solution now?

Answer 6

cosx

Answer 7

correct