Another integral problem that really is a problem (for me )?

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The discussion revolves around solving a specific integral problem using the formula cos(x) = cos(x/2)^2 - sin(x/2)^2. Participants emphasize the importance of applying this trigonometric identity in the denominator to simplify the integral. The shared attempts at the solution highlight common challenges faced when tackling such integrals. Overall, the conversation underscores the necessity of mastering trigonometric identities for effective problem-solving in calculus.

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mooncrater
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The question is an integral that has been attached .
Related equations :
N\a
An attempt to the solution :
Attached.
 

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HINT:use the formula cos(x)=cos(x/2)^2-sin(x/2)^2 in denominator.And then try again.
 

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