I can do these now but I am stuck on this indefinite integration. So I thought try letting u = sinx. du/dx = cosx. And then. But that is not correct answer. Can anyone please guide me. Angus
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Originally Posted by angypangy I can do these now but I am stuck on this indefinite integration. So I thought try letting u = sinx. du/dx = cosx. And then. What is the derivative of
Originally Posted by Plato What is the derivative of so it would be or Is that correct?
Last edited by angypangy; Jan 2nd 2012 at 01:19 PM. Reason: tex editing
Originally Posted by angypangy so it would be or Is that correct? Yes it is. Now look at what you said the antiderivative was.
Originally Posted by Plato Yes it is. Now look at what you said the antiderivative was. So, just because the integral of 1/x is lnx, the integral of 1/u^2 is NOT ln x^2?
Originally Posted by angypangy So, just because the integral of 1/x is lnx, the integral of 1/u^2 is NOT ln x^2?
knowing your trig identities and basic trig derivatives may help ...
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