SOLUTION: Hello, Please help me solve this problem with trigonometry, The question is to expand and simplify using the compound angle formulae, Question 1- Sin(A

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Question 684716: Hello,
Please help me solve this problem with trigonometry,
The question is to expand and simplify using the compound angle formulae,
Question 1- Sin(A - B) + Cos(A +B)
Question 2- Sin(A - B) - Cos(A - B)
Thank you so much
Found 2 solutions by Alan3354, lynnlo:
Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website!
Question 1- Sin(A - B) + Cos(A +B)
Question 2- Sin(A - B) - Cos(A - B)
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google "half angle formula", or look it up on wikipedia, or any of several other sites.
This is well covered.

Answer by lynnlo(4176) (Show Source):
You can put this solution on YOUR website!
(1)sin(a-b)-cos(a+b)=====ALREADY SIMPLIFIED
SIN(X)cos(b)-cos(x)sin(b)-cos(b)cos(a)+sin(b)sin(a)

(2)sin(a-b)-cos(a-b)==========simplified
sin(a)cos(b)-cos(a)sin(b)-cos(b)cos(a)-sin(a)sin(b)

SOLUTION: Hello, Please help me solve this problem with trigonometry, The question is to expand and simplify using the compound angle formulae, Question 1- Sin(A - B) + Cos(A +B)