Does this have a closed form?

Does the following expression have a closed form? 0π2xsinx+cosxdx\int_0^{\frac{\pi}{2}} x^{\sin x + \cos x} \, dx

#Calculus

Note by A Former Brilliant Member
5 years ago

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I seriously doubt it's possible. Why do you think a closed form exists in the first place?

Pi Han Goh - 5 years ago

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Because it was asked in an examination :P (the exact way is given in this question)

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@A Former Brilliant Member The point of that question is to find the integer part of the numerical value of that integral, not the exact form of the integral.

Pi Han Goh - 5 years ago

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@Pi Han Goh I know. But many times, they give stuff whose closed form can be found using out of syllabus stuff but we're expected to get bounds via elementary methods. So, I was curious...

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@A Former Brilliant Member Don't worry about it. There are infinitely many integrals that don't have a closed form.

Pi Han Goh - 5 years ago
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