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4vir4ik [10]
3 years ago
14

Help Me Please !! THX!

Mathematics
1 answer:
solong [7]3 years ago
8 0

Answer: decreases

Step-by-step explanation:

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Need help on this calculus
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\displaystyle\int\sin^3t\cos^3t\,\mathrm dt

One thing you could do is to expand either a factor of \sin^2t or \cos^2t, then expand the integrand. I'll do the first.

You have

\sin^2t=1-\cos^2t

which means the integral is equivalent to

\displaystyle\int\sin t(1-\cos^2t)\cos^3t\,\mathrm dt

Substitute u=\cos t, so that \mathrm du=-\sin t\,\mathrm dt. This makes it so that the integral above can be rewritten in terms of u as

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Now just use the power rule:

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Back-substitute to get the antiderivative back in terms of t:

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