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rpond-21-Visitor
1-Visitor
January 24, 2017
Question

symbolic math sum over n of cos(nx) yields closed form solution. Sum over n of sin(nx) gives complex result. ??Help

trig simplifications1.jpg

7 replies

MJG1-Visitor
1-Visitor
January 24, 2017

How about this?  I'm not sure why Mathcad can't make the simplification on its own.

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rpond-21-VisitorAuthor
1-Visitor
January 24, 2017

Thanks! I tried expand but it seemed like I was going the wrong way. I gave up too soon. Who would have thunk it.

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AlanStevens19-Tanzanite
19-Tanzanite
January 24, 2017

Try using the keyword "rectangular".

trigsum.PNG

Alan

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    -MFra-21-Topaz II
    21-Topaz II
    January 25, 2017

    sincos.jpg

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