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Mathematics 60 Online
OpenStudy (anonymous):

Can someone tell me how can it be like this?please upload detailed answer http://imageshack.us/photo/my-images/843/dsc00441jz.jpg/

OpenStudy (owlfred):

Hoot! You just asked your first question! Hang tight while I find people to answer it for you. You can thank people who give you good answers by clicking the 'Good Answer' button on the right!

OpenStudy (watchmath):

Recall that \(\cos(2x)=2\cos^2(x)-1\) Plugin \(x=\theta/2\) we have \(1+\cos(\theta)=2\cos^2(\theta/2)\). When you take the square root of that you get \(\sqrt{2}\sqrt{\cos^2(\theta/2)}\) and then this the two square roots become \(2\) in the front of the integral.

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