\[\cos A \cos A+(\cos A)^2 \cos (2A)+(\cos A)^3 \cos (3A)+\cdots+(\cos A)^n \cos (nA)\]..
where is trigonmetry??
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the arrivals
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- Joined:Tue Dec 21, 2010 10:17 pm
sum the following n-term series for $A=30^o$.
\[\cos A \cos A+(\cos A)^2 \cos (2A)+(\cos A)^3 \cos (3A)+\cdots+(\cos A)^n \cos (nA)\]..
\[\cos A \cos A+(\cos A)^2 \cos (2A)+(\cos A)^3 \cos (3A)+\cdots+(\cos A)^n \cos (nA)\]..
women of purity are for men of purity and hence men of purity are for women of purity - THE HOLY QURAN
Re: where is trigonmetry??
"Inspiration is needed in geometry, just as much as in poetry." -- Aleksandr Pushkin
Please install LaTeX fonts in your PC for better looking equations,
learn how to write equations, and don't forget to read Forum Guide and Rules.
Please install LaTeX fonts in your PC for better looking equations,
learn how to write equations, and don't forget to read Forum Guide and Rules.
-
the arrivals
- Posts:41
- Joined:Tue Dec 21, 2010 10:17 pm
Re: where is trigonmetry??
its from CRUX.you know what i mean 
women of purity are for men of purity and hence men of purity are for women of purity - THE HOLY QURAN
Re: where is trigonmetry??
I think trying with $cos \theta = Re ( e^{i \theta}) $ works...........
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Nur Muhammad Shafiullah | Mahi
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Nur Muhammad Shafiullah | Mahi