The problem is to find the summary of this statement:
sin(x)+sin(3x)+sin(5x)+⋯+sin(2n−1)x=
I've tried to rewrite all sinuses as complex numbers but it was in vain. I suppose there is much more complicated method to do this. I think it may be solved somehow using complex numbers or progressoins.
How it's solved using complex numbers or even without them if possible?
Thanks a lot.
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