Here is what I have done (I left out all my early steps):
Can someone please check this for me? Should I do a u sub with ? Thanks!!
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I think you went one line too far. , which is an easy integral.
Just to make sure, I will assume that you meant
In your second step, you probably forgot to write .
In your last step, you applied a trig identity in a wrong way. is a standard form. If it helps,
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