Is there a known formula for integrating cos^5x sin^5x?

In summary, the conversation involves finding the integral of cos^5 x sin^5 x and discussing different methods and formulas to solve it. The final solution involves using u-substitution and splitting up the cos^5 x term. The conversation also mentions checking the answer by taking the derivative and including a constant of integration.
  • #1
johnhuntsman
76
0
∫cos^5 x sin^5 x dx

I thought I would try to solve this by first doing:

∫(1 - sin^2 x) cos^3 x sin^5 x dx

but would like to know if that's right.

[Edit] Is the answer something like (sin^6 x) / 6 - (sin^8 x) / 4 + (sin^10 x) / 10 ?[Edit]
 
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  • #2
johnhuntsman said:
∫cos^5 x sin^5 x dx

I thought I would try to solve this by first doing:

∫(1 - sin^2 x) cos^3 x sin^5 x dx

but would like to know if that's right.

[Edit] Is the answer something like (sin^6 x) / 6 - (sin^8 x) / 4 + (sin^10 x) / 10 ?[Edit]
How did you get it?

Take the derivative, to check it.


Don't forget the constant of integration.
 
  • #3
SammyS said:
How did you get it?

I split up the cos^3 x just like I did the cos before. Then used u substitution.

SammyS said:
Take the derivative, to check it.

I did. Thanks, everything's okey dokey now : D
 
  • #4
I think simpler would be just to ask - is there any well known formula involving cosx.sin x ?
 

FAQ: Is there a known formula for integrating cos^5x sin^5x?

What is trigonometric integration?

Trigonometric integration is a method used in calculus to find the integral of a function that contains trigonometric functions, such as sine, cosine, or tangent. It involves using trigonometric identities and substitution to simplify the integral and solve it.

What are some common trigonometric identities used in integration?

Some common trigonometric identities used in integration include the Pythagorean identities, sum and difference formulas, and double angle formulas. These identities help to simplify trigonometric expressions and make them easier to integrate.

How do you determine which trigonometric substitution to use?

The substitution to use in trigonometric integration depends on the form of the integral and the trigonometric functions involved. In general, substitution should make the integral simpler and eliminate any terms that cannot be integrated. It is important to also check for any restrictions on the substitution, such as the range of values for the variable.

Can trigonometric integration be solved using other methods?

Yes, trigonometric integration can also be solved using integration by parts, partial fractions, or other methods. However, using trigonometric substitution may be more efficient and straightforward for certain integrals containing trigonometric functions.

How can I check if my trigonometric integration is correct?

To check if your trigonometric integration is correct, you can differentiate the result and see if it matches the original function. You can also use online integration calculators or ask a math tutor for assistance. It is important to always double-check your work to ensure accuracy.

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