1sin(45^(@)+A)-sin(45^(@)-A)=sqrt(2)

Prove that: cos(45^(@)-A)cos(45^(@)-B)-sin(45^(@)-A)sin(45^(@)-B)=sin(A+B)

Prove that: i) sin(A+B)cos(A-B)-cos(A+B)sin(A-B)=sin2B ii) cos(45^(@)-A)cos(45^(@)-B)-sin(45^(@)-A)sin(45^(@)-B)=sin(A+B)

Prove that: i) sin(A+B)cos(A-B)-cos(A+B)sin(A-B)=sin2B ii) cos(45^(@)-A)cos(45^(@)-B)-sin(45^(@)-A)sin(45^(@)-B)=sin(A+B)

sin225^(@)=sin(180^(@)+45^(@))=-sin45^(@)=-(1)/(sqrt(2)) cos246^(@)=cos(180^(@)+66^(@))=-cos66^(@)=-0.4067 tan211^(@)=tan(180^(@)+31^(@))=tan31^(@)=0.6009 .

Prove that sin(45^@+A)sin(45^@-A)=1/2cos2A.

cos 45^(@)-sin 45^(@)=?

sin (45 ^ (@) + A) sin (45 ^ (@) - A) = (1) / (2) cos2A

Simplify sin(A+45^(@))sin(A-45^(@)) .

Prove that, cos^(2)45^(@)-sin^(2)15^(@)=sqrt(3)/(4)

Prove that: sin(45^(@)-A)sin(45+A)=1/2cos2A