English

∫ Cos X Sin 2 X + 4 Sin X + 5 D X - Mathematics

Advertisements
Advertisements

Question

\[\int\frac{\cos x}{\sin^2 x + 4 \sin x + 5} dx\]
Sum
Advertisements

Solution

` ∫ { cos  x  dx}/{sin^2 x + 4\sin x + 5}`
\[\text{ let }\sin x = t\]
\[ \Rightarrow \text{cos x dx }= dt\]
Now, ` ∫ { cos  x  dx}/{sin^2 x + 4\sin x + 5}`
\[ = \int\frac{dt}{t^2 + 4t + 5}\]
\[ = \int\frac{dt}{t^2 + 2 \times t \times 2 + 4 + 1}\]
\[ = \int\frac{dt}{\left( t + 2 \right)^2 + 1^2}\]
\[ = \frac{1}{1} \tan^{- 1} \left( \frac{t + 2}{1} \right) + C\]
\[ = \tan^{- 1} \left( \sin x + 2 \right) + C\]

shaalaa.com
  Is there an error in this question or solution?
Chapter 19: Indefinite Integrals - Exercise 19.16 [Page 90]

APPEARS IN

RD Sharma Mathematics [English] Class 12
Chapter 19 Indefinite Integrals
Exercise 19.16 | Q 3 | Page 90

Video TutorialsVIEW ALL [1]

RELATED QUESTIONS

\[\int\frac{1}{1 - \cos x} dx\]

\[\int\frac{1 + \cos 4x}{\cot x - \tan x} dx\]

\[\int \sin^2 \frac{x}{2} dx\]

` ∫    cos  mx  cos  nx  dx `

 


\[\int x^3 \cos x^4 dx\]

\[\int x^3 \sin x^4 dx\]

` ∫    x   {tan^{- 1} x^2}/{1 + x^4} dx`

\[\int\frac{1}{\sqrt{x} + x} \text{ dx }\]

\[\int\left( 2 x^2 + 3 \right) \sqrt{x + 2} \text{ dx  }\]

` ∫    \sqrt{tan x}     sec^4  x   dx `


\[\int \sin^3 x \cos^5 x \text{ dx  }\]

\[\int\frac{1}{a^2 - b^2 x^2} dx\]

\[\int\frac{1}{4 x^2 + 12x + 5} dx\]

\[\int\frac{e^x}{e^{2x} + 5 e^x + 6} dx\]

\[\int\frac{x}{x^2 + 3x + 2} dx\]

\[\int\frac{\left( 1 - x^2 \right)}{x \left( 1 - 2x \right)} \text
{dx\]

\[\int\frac{x - 1}{\sqrt{x^2 + 1}} \text{ dx }\]

\[\int\frac{1}{1 + 3 \sin^2 x} \text{ dx }\]

\[\int\frac{1}{1 - 2 \sin x} \text{ dx }\]

\[\int x^2 \text{ cos x dx }\]

\[\int x\left( \frac{\sec 2x - 1}{\sec 2x + 1} \right) dx\]

\[\int \cos^{- 1} \left( 4 x^3 - 3x \right) \text{ dx }\]

\[\int x^3 \tan^{- 1}\text{  x dx }\]

\[\int\frac{\sqrt{1 - \sin x}}{1 + \cos x} e^{- x/2}  \text{ dx }\]

\[\int x^2 \sqrt{a^6 - x^6} \text{ dx}\]

\[\int\sqrt{2x - x^2} \text{ dx}\]

\[\int(2x + 5)\sqrt{10 - 4x - 3 x^2}dx\]

\[\int\frac{x^3}{\left( x - 1 \right) \left( x - 2 \right) \left( x - 3 \right)} dx\]

\[\int\frac{x^2 + 6x - 8}{x^3 - 4x} dx\]

\[\int\frac{18}{\left( x + 2 \right) \left( x^2 + 4 \right)} dx\]

Evaluate the following integral:

\[\int\frac{x^2}{\left( x^2 + a^2 \right)\left( x^2 + b^2 \right)}dx\]

Evaluate the following integral:

\[\int\frac{x^2}{1 - x^4}dx\]

\[\int\frac{1}{x^4 + x^2 + 1} \text{ dx }\]

\[\int\frac{1}{x^4 + 3 x^2 + 1} \text{ dx }\]

\[\int\frac{1}{\cos x + \sqrt{3} \sin x} \text{ dx } \] is equal to

The primitive of the function \[f\left( x \right) = \left( 1 - \frac{1}{x^2} \right) a^{x + \frac{1}{x}} , a > 0\text{ is}\]


\[\int\frac{\sin^5 x}{\cos^4 x} \text{ dx }\]

\[\int\frac{\sin 4x - 2}{1 - \cos 4x} e^{2x} \text{ dx}\]

\[\int\frac{\cot x + \cot^3 x}{1 + \cot^3 x} \text{ dx}\]

Find :  \[\int\frac{e^x}{\left( 2 + e^x \right)\left( 4 + e^{2x} \right)}dx.\] 

 


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×