Help finding integral of trigonometric function

In summary, the problem is to find the integral of 4tan(x^2) from 0 to √(π)/2. The attempted solutions include trying u-substitution and looking for a relevant trig identity, as well as changing it to a ratio of sine and cosine and integrating by parts. However, it is noted that trig functions of x^2 can be difficult to work with and alternative methods may be more effective.
  • #1
student93
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Homework Statement



4∫tan(x^2)dx from 0 to √(π)/2

Homework Equations



4∫tan(x^2)dx from 0 to √(π)/2

The Attempt at a Solution



I tried doing u-substitution, which didn't work, and also tried to look for a trig identity and wasn't able to find any relevant one.
 
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  • #2
Have you tried changing it to a ratio of sine and cosine and integrating by parts?
How about changing it to exponential form and tackling that?

in general trig functions of x^2 are pretty nasty.
If this is part of an exercise you should look to your notes about similar functions.
If not you may want to consider working your actual problem by another means.
 
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1. What is the general formula for finding the integral of a trigonometric function?

The general formula for finding the integral of a trigonometric function is ∫sin(ax)dx = -1/a cos(ax) + C or ∫cos(ax)dx = 1/a sin(ax) + C, where a is a constant and C is the constant of integration.

2. How do I determine the limits of integration for a trigonometric integral?

The limits of integration for a trigonometric integral can be determined by looking at the given function and identifying the range of values for which the function is defined. These values will be used as the lower and upper limits of integration.

3. Can I use substitution to solve a trigonometric integral?

Yes, substitution can be used to solve a trigonometric integral. This method involves substituting a new variable for the trigonometric function and then using integration techniques to solve for the new variable. This can be particularly helpful when dealing with more complex trigonometric functions.

4. Are there any special cases when solving trigonometric integrals?

Yes, there are a few special cases when solving trigonometric integrals. These include integrals involving the tangent and cotangent functions, which require using logarithmic functions in the solution. Additionally, integrals involving the secant and cosecant functions may require using trigonometric identities to simplify the integration process.

5. Is it possible to solve a trigonometric integral without using integration techniques?

No, it is not possible to solve a trigonometric integral without using integration techniques. Trigonometric integrals involve integrating functions with trigonometric terms, and these cannot be solved without using integration methods such as substitution, integration by parts, or trigonometric identities.

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