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Math Help - Evaluating sin n(a+b)

  1. #1
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    Evaluating sin n(a+b)

    Knowing that sin (a+b) = sin(a)cos(b)+sin(b)cos(a), is there a generic form for evaluating sin (n(a+b))?

    Thanks for the help!
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  2. #2
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    Quote Originally Posted by Ten_No_Ryu View Post
    Knowing that sin (a+b) = sin(a)cos(b)+sin(b)cos(a), is there a generic form for evaluating sin (n(a+b))?

    Thanks for the help!
    Plug and chug my friend!

    sin(n(a+b))=sin(na)cos(nb)+sin(nb)cos(na)
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  3. #3
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    Thanks!

    It's been far too long since I've had a math class, and here I am in Calculus I. Fortunately, the TA has agreed to spend a few hours with myself and other students drilling (into our heads) the concepts from algebra, pre-cal, and trig that we've forgotten. If only he'd find a room we can use...
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