Question:
If the integral
$\int \frac{5\,tan\, x }{tan \,x - 2} dx = x + a \ell n |sin x - 2 cos x| + k$, then $a$ is equal to :
If the integral
$\int \frac{5\,tan\, x }{tan \,x - 2} dx = x + a \ell n |sin x - 2 cos x| + k$, then $a$ is equal to :
Updated On: Jul 28, 2022
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The Correct Option is D
Solution and Explanation
$\int \frac{5\,tan\, x }{tan \,x - 2} dx = \int \frac{5\,tan\, x }{sin \,x - 2\,cos\,x} dx = \int \frac{\left(sin \,x - 2\,cos\,x\right)+2\left(cos\,x + 2\,sin\,x\right)}{\left(sin \,x - 2\,cos\,x\right)}dx$
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Concepts Used:
Integral
The representation of the area of a region under a curve is called to be as integral. The actual value of an integral can be acquired (approximately) by drawing rectangles.
- The definite integral of a function can be shown as the area of the region bounded by its graph of the given function between two points in the line.
- The area of a region is found by splitting it into thin vertical rectangles and applying the lower and the upper limits, the area of the region is summarized.
- An integral of a function over an interval on which the integral is described.
Also, F(x) is known to be a Newton-Leibnitz integral or antiderivative or primitive of a function f(x) on an interval I.
F'(x) = f(x)
For every value of x = I.
Types of Integrals:
Integral calculus helps to resolve two major types of problems:
- The problem of getting a function if its derivative is given.
- The problem of getting the area bounded by the graph of a function under given situations.