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[prisma salmon]

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[bright hazel]

Differentiate both parts, then simplify.

[rustic epoch]

Is there any other way?

[bright hazel]

Well, you can simplify the expression under the integral first if you want.

[rustic epoch]

I want to know the simplicification

[bright hazel]

Alright.
First, use 1 + cos(t) = 2cos(t/2)^2 for the numerator.
Then, use tan(t) - cot(t) = -2cot(2t) for the denominator.

[rustic epoch]

Ok

Did