Integral for a differential equation problem

In summary, an integral for a differential equation problem is a mathematical tool used to solve differential equations by finding the anti-derivative of the equation. It is used to find the general solution of the equation, which can then be used to find specific solutions for different initial conditions. There are two types of integrals, definite and indefinite, which differ in terms of the specified interval. Different methods can be used to solve integrals for differential equation problems, depending on the type of equation. Additionally, integrals are widely used in real-world applications in various fields of science and engineering to model and predict phenomena.
  • #1
sihag
29
0
i'm stuck on this relatively simply integral for a differential equation problem ...

| du / cos(pi/4 - u )
where | denotes the integral sign

some help ?
 
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  • #2
sihag said:
∫ du / cos(π/4 - u)

Hi sihag! :smile:

Hint: substitute v = u - π/4. :smile:

(and copy the symbols below for future use! :smile:)
 
  • #3
After letting [itex]\frac{\pi}{4} - u =x[/itex], all you need to know is [tex]\int \frac{1}{\cos x} dx = \log_e | \frac{1+\sin x}{\cos x} | + C[/tex].
 

1. What is an integral for a differential equation problem?

An integral for a differential equation problem is a mathematical tool used to solve differential equations. It involves finding the function that satisfies the given differential equation by finding the anti-derivative of the equation.

2. How is an integral used in solving a differential equation problem?

An integral is used to find the general solution of a differential equation, which is a function that satisfies the equation for all possible values of the independent variable. This solution can then be used to find specific solutions for different initial conditions.

3. What is the difference between a definite and indefinite integral for a differential equation problem?

A definite integral for a differential equation problem involves finding the area under the curve of the function that satisfies the equation, within a specific interval. An indefinite integral, on the other hand, involves finding the general solution of the differential equation without specifying any particular interval.

4. What are the different methods for solving an integral for a differential equation problem?

There are several methods for solving an integral for a differential equation problem, including separation of variables, substitution, and integration by parts. The method used depends on the type of differential equation and the techniques that are most suitable for solving it.

5. How is an integral used in real-world applications?

Integrals for differential equation problems are used in many fields of science and engineering, such as physics, chemistry, and economics. They are particularly useful in modeling and predicting real-world phenomena, such as population growth, chemical reactions, and fluid dynamics.

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