Hey, I have a Trigonometry Proofs question that I'm Struggling with.

[Natenatoor]

The Question is:
If A, B and C are successive terms in an arithmetic series, prove that
sin A + sin C = 2 sin B cos(B-A)
Thanks in advance.

 

[Deleted member 4993]

The Question is:
If A, B and C are successive terms in an arithmetic series, prove that
sin A + sin C = 2 sin B cos(B-A)
Thanks in advance.

Hint:

A = B - x ....... and ........ C = B + x

Continue...

 

[Dr.Peterson]

The Question is:
If A, B and C are successive terms in an arithmetic series, prove that
sin A + sin C = 2 sin B cos(B-A)
Thanks in advance.

Have you learned the sum-to-product identities yet?