The problem states:(adsbygoogle = window.adsbygoogle || []).push({});

Express Cos( Θ_{1}+ Θ_{2}+ Θ_{3}) in terms of Sin(Θ_{k}) and Cos(Θ_{k}), k = 1, 2, 3, using the relation e^{+/-i*Θ}= Cos(Θ) +/- i*Sin(Θ). [Hint: Use the product property of the exponential e.g., e]^{(Θ1 + Θ2)}= e^{i*Θ1}e^{i*Θ2}.

I'm really confused by, how does this apply to the problem?in terms of Sin(Θ_{k}) and Cos(Θ_{k}), k = 1, 2, 3

I'm really lost, someone please steer me in the right direction.

Thanks,

Frank

Edit: Not sure what's wrong with my &theta ?

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# Expressing a trig function as a complex expodential (HELP!)

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