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section 1A, 6b, I don't know where to begin with this one. I'm pretty sure I have to use a trig identity, but I'm having trouble getting started. Thanks!
 10 months ago
 10 months ago
section 1A, 6b, I don't know where to begin with this one. I'm pretty sure I have to use a trig identity, but I'm having trouble getting started. Thanks!
 10 months ago
 10 months ago

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tbyBest ResponseYou've already chosen the best response.1
There's a really clear answer here: http://math.stackexchange.com/questions/179334/showintheformasinxcsinxcosx
 10 months ago
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