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April 19, 2014

Homework Help: Math

Posted by NeedHelpPlz on Friday, January 13, 2012 at 10:34pm.

I don't get how you get these answers:

cos180 degree = -1
sin45 degree = root(2)/2
cos(-135) = -root(2)/2
cot(-60) = -1/root(3) or -root(3)/3

What does cos or sin do to make the answer different?

please help

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