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Gernald
Feb 19, 2009, 10:52 AM
I'm trying to figure out how to differentiate cos(pi x)/(sin(pi x)+cos(pi x)) and am so confused! Do I combine the chain rule with the quotient rule, and onc I get there how do I simplify? Right now I have an equation that's bigger than the width of the paper.

Thanks for any help!

Perito
Feb 19, 2009, 02:45 PM
The derivative of sin(x) (with respect to x) is cos(x)
The derivative of cos(x) (with respect to x) is -sin(x)

You need to combine the chain rule with the quotient rule.