Help me w/ math!

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Pie + NYQuil = FTW
Apr 5, 2005
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Edmonds, Wa
So.. I'm sitting here staring at these gay problems for my math take home..

If you can lend me some help; go for it.

1. prove:

sin(3X) = 3sinx - 4sin^3x

2. prove:

-ln|cscx + cotx| = ln|cscx-cotx|

3. Rewrite 5sin(x)-2cos(x) in terms of one sine only. Round to nearest hundredth of a radian.

Thanks,
Kyle Ackerman