Time remaining:
express the given product as a sum containing only sines/cosines

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Oct 20th, 2017

using the formula: sin u sin v = 1/2[cos(u - v) - cos(u+v)] sin6θ sin2θ 
= 1/2[cos(6θ - 2θ) - cos(6θ + 2θ)]
= 1/2(cos4θ - cos8θ) 


Mar 3rd, 2015

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Oct 20th, 2017
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Oct 20th, 2017
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