can someone explain to me why this is so? its not clicking yet I know tan = sin/cos the derivative of sin = cos the derivative of cos = -sin I just don't know how to piece all of this together Thanks
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anyone?
It is just a matter of fairly simple algebra. There are no derivatives there.
Originally Posted by Plato It is just a matter of fairly simple algebra. There are no derivatives there. well that makes me feel even worse because I don't even know where to start Edit: where does the multiplication of 2cos on top and cos on bottom come from?
Last edited by silencecloak; Oct 7th 2008 at 08:15 AM.
Originally Posted by silencecloak well that makes me feel even worse because I don't even know where to start they factored out the 2, turned tan into sin/cos and multiplied by a factor of one. that factor of one they used is cos/cos. should be easy peezy lemon squeezy after that.
Originally Posted by silencecloak well that makes me feel even worse because I don't even know where to start Edit: where does the multiplication of 2cos on top and cos on bottom come from? they use it as a factor to reduce the equation further.
Originally Posted by p00ndawg they factored out the 2, turned tan into sin/cos and multiplied by a factor of one. that factor of one they used is cos/cos. should be easy peezy lemon squeezy after that. Thanks, I feel pretty dumb lol. Just got to get used to looking at those problems the same way I do with regular numbered problems.
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