SOLUTION: By using sum or difference formulas, sin(x−pi) can be written as:? A. -sin (x) B. sin (x) C. -cos (x) D. cos (x) E. All the above F. None of the above My ans: I go

Algebra ->  Trigonometry-basics -> SOLUTION: By using sum or difference formulas, sin(x−pi) can be written as:? A. -sin (x) B. sin (x) C. -cos (x) D. cos (x) E. All the above F. None of the above My ans: I go      Log On


   



Question 671121: By using sum or difference formulas, sin(x−pi) can be written as:?
A. -sin (x)
B. sin (x)
C. -cos (x)
D. cos (x)
E. All the above
F. None of the above

My ans: I got -sin (x) and -cos (x) for sure. Not sure if this is correct. I have a feeling it's All of the above, but my notes do not say otherwise. Thank you!

Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
By using sum or difference formulas, sin(x−pi) can be written as:?
**
sin(x-π)
=sinxcosπ-cosxsinπ
=sinx*-1-cosx*0
=-sinx-0
=-sinx