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pl. help!!!

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- Thread starter phymatter
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- #1

- 131

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pl. help!!!

- #2

CompuChip

Science Advisor

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One thing you could do, besides trying to use algebraic identities to transform one into the other, is plug in some values (for example [itex]0, \pi/12, 2\pi/12, 3\pi/12, \ldots, \pi[/itex]) or draw the graphs of the two expressions (for example, http://www.wolframalpha.com/input/?i=plot+2+cos(x)+sin(x)+and+sin(2x)).

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