Question

Write the expression as either the sine, cosine, or tangent of a single angle
sin(pi/2)cos(pi/7)+cos(pi/2)sin(pi/7)

Answer 1

sin(x)cos(y)+sin(y)cos(x)=sin(x+y)

using that,
sin(pi/2)cos(pi/7)+cos(pi/2)sin(pi/7) = sin(9pi/14)

Answer 2

is that the answer

Answer 3

yeah

Answer 4

thanks