I have no idea how to work this problem using addition or subtraction theories (x-n) = -sin x Thanks!
Last edited by pmacp; May 7th 2010 at 04:57 PM.
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Originally Posted by pmacp I have no idea how to work this problem using addition or subtraction theories (x-n) = -sin x Thanks! What are you trying to do? What is the whole the question verbatim?
Prove the confunction identity sin (x - π) = -sin x using the addition or subtraction formulas.
$\displaystyle sin(x-\pi)=sin(x)cos(\pi)-cos(x)sin(\pi)=-sin(x)$
thank you!
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