Question

Write the expression as either the sine, cosine, or tangent of a single angle.
\(\bf sin(\dfrac{\pi}{2})~cos(\dfrac{\pi}{7})~+~cos(\dfrac{\pi}{2})~sin(\dfrac{\pi}{7})\)

Answer 1

sin(pi/2 + pi/7)

Answer 2

recall:

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

Answer 3

sin(9pi/14)

Answer 4

Yes I just remembered that could be used with this

Answer 5

Thanks!

Answer 6

np

Answer 7

@DanJS Could you help me with proving trig equations?

Answer 8

sure