Home
Class 12
MATHS
Evaluate: int0^(pi/2)log((4+3sinx)/(4+3c...

Evaluate: `int_0^(pi/2)log((4+3sinx)/(4+3cosx))dx`

Text Solution

Verified by Experts

Let `I=int_(0)^((pi)/2)log((4+3sinx)/(4+3cosx))dx`……………1
`=int_(0)^((pi)/2)log[(4+3sin((pi)/2-x))/(4+3cos((pi)/2-x))]dx`
`=int_(0)^((pi)/2)log((4+3cosx)/(4+3cosx))dx`……………..2
Adding 1 and 2 we get
`2I=int_(0)^((pi)/2){log((4+3sinx)/(4+3cosx))+log((4+3cosx)/(4+3sinx))}dx`
`=int_(0)^((pi)/2)log((4+3sinx)/(4+3cosx)xx(4+3cosx)/(4+3sinx))dx`
`=int_(0)^(pi//2)log1 dx=0`
or `I=0`
Promotional Banner

Topper's Solved these Questions

  • DEFINITE INTEGRATION

    CENGAGE|Exercise Exercise 8.1|4 Videos
  • DEFINITE INTEGRATION

    CENGAGE|Exercise Exercise 8.2|17 Videos
  • CURVE TRACING

    CENGAGE|Exercise Exercise|24 Videos
  • DETERMINANT

    CENGAGE|Exercise Multiple Correct Answer|5 Videos

Similar Questions

Explore conceptually related problems

The value of int_(0)^(pi//2)lot((4+3sinx)/(4+3cosx))dx is

Evaluate: int_(0)^((pi)/(2))log((4+3sin x)/(4+3cos x))dx

Using the properties of definite integral Evaluate : int_0^(pi/2) sinx /(sinx + cosx) dx

The value of int_0^(pi//2) log ((4+3 sin x)/(4+3 cos x)) dx is:

Evaluate : int_(0)^(pi//2)(cosx)/((3cosx+sinx))dx .

Evaluate: int_0^(pi//2)x/(sinx+cosx)dx

Evaluate int_0^(pi/2) (sinx-cosx)/(1+sinxcosx)dx

Evaluate int_(0)^((pi)/2)(sin3x)/(sinx+cosx) dx .

Evaluate int_0^(pi/2)sinx.log cosx dx

Evaluate: int_0^(pi/2) ((x-pi/4)^2 sinx)/(sinx+cosx)dx

CENGAGE-DEFINITE INTEGRATION -JEE Advanced Previous Year
  1. Evaluate: int0^(pi/2)log((4+3sinx)/(4+3cosx))dx

    Text Solution

    |

  2. Let f be a non-negative function defined on the interval .[0,1].If int...

    Text Solution

    |

  3. The value of int0^1(x^4(1-x)^4)/(1+x^2)\ dx is

    Text Solution

    |

  4. Let f be a real-valued function defined on the inverval (-1,1) such th...

    Text Solution

    |

  5. The valued of int(sqrt(In2))^(sqrt(In3)) (x sinx^(2))/(sinx^(2)+sin(In...

    Text Solution

    |

  6. Let f:[-1,2]vec[0,oo) be a continuous function such that f(x)=f(1-x)fo...

    Text Solution

    |

  7. Let f:[1/2,1]vecR (the set of all real numbers) be a positive, non-con...

    Text Solution

    |

  8. Let f:[0,2]vecR be a function which is continuous on [0,2] and is diff...

    Text Solution

    |

  9. int((pi)/4)^((pi)/2)(2cosecx)^17 dx

    Text Solution

    |

  10. Let f prime(x)=(192x^3)/(2+sin^4 pix) for all x in RR with f(1/2)=0. I...

    Text Solution

    |

  11. Evaluate: int(-pi//2)^(pi//2)(cosx)/(1+e^x)dx

    Text Solution

    |

  12. If In=int(-pi)^(pi) \ (sinnx)/((1+pi^x) \ sinx) \ dx, n=0,1,2,...... t...

    Text Solution

    |

  13. Let f be a real-valued function defined on interval (0,oo),by f(x)=lnx...

    Text Solution

    |

  14. Let S be the area of the region enclosed by y=e^-x^2,y=0,x=0,a n dx=1....

    Text Solution

    |

  15. Find a for which lim(n->oo) (1^a+2^a+3^a+...+n^a)/((n+1)^(a-1)[(na+1)+...

    Text Solution

    |

  16. Let f:[a,b]to[1,oo) be a continuous function and let g:RtoR be defined...

    Text Solution

    |

  17. Let f:(0,oo) in R be given f(x)=overset(x)underset(1//x)int e^-(t+(1...

    Text Solution

    |

  18. The option(s) with the values of aa n dL that satisfy the following eq...

    Text Solution

    |

  19. Let f(x)=7tan^8x+7tan^6x-3tan^4x-3tan^4x-3tan^2x for all x in (-pi/2,...

    Text Solution

    |

  20. Let f(x)=lim(n->oo)((n^n(x+n)(x+n/2)....(x+n/n))/(n!(x^2+n^2)(x^2+n^2/...

    Text Solution

    |

  21. Let f: Rvec(0,1) be a continuous function. Then, which of the followin...

    Text Solution

    |