Home
Class 11
MATHS
If 1-1/3+1/5-1/7+1/9-1/(11)+=pi/4 , then...

If `1-1/3+1/5-1/7+1/9-1/(11)+=pi/4` , then value of `1/(1xx3)+1/(5xx7)+1/(9xx11)+` is `pi//8` b. `pi//6` c. `pi//4` d. `pi//36`

Promotional Banner

Topper's Solved these Questions

  • RELATIONS AND FUNCTIONS

    CENGAGE PUBLICATION|Exercise All Questions|9 Videos

  • STRAIGHT LINES

    CENGAGE PUBLICATION|Exercise All Questions|486 Videos

Similar Questions

Explore conceptually related problems

The value of int_((pi)/(4))^((3pi)/(4))(dx)/(1+cosx) is -

The value of (1+cospi//6)(1+cospi//3)(1+cos2pi//3)(1+cos7pi//6) is

1+1/4 + (1xx3)/(4xx8) + (1xx3xx5)/(4xx8xx12) + "….." is equal to

If (3-tan^2(pi/7))/(1-tan^2(pi/7))=kcos(pi/7) then the value of k is (a)1 (b) 2 (c) 3 (d) 4

Find the value of (1+cos (pi/8))(1+cos(3pi/8))(1+cos(5pi/8))(1+cos(7pi/8))

If tan^(-1)(x^2+3|x|-4)+cot^(-1)(4pi+sin^(-1)sin 14)=pi/2, t h e n the value of sin^(-1)sin2x is (a) 6-2pi (b) 2pi-6 (c) pi-3 (d) 3-pi

Range of tan^(-1)((2x)/(1+x^2)) is (a) [-pi/4,pi/4] (b) (-pi/2,pi/2) (c) (-pi/2,pi/4) (d) [pi/4,pi/2]

If sin^(-1)x=pi/5 , for some x in (-1,1), then find the value of cos^(-1)x

The value of [(1+cos(pi/8)+isin(pi/8))/(1+cos(pi/8)-isin(pi/8))]^8 is

CENGAGE PUBLICATION-SEQUENCES AND SERIES-All Questions
  1. If tn=1/4(n+2)(n+3) for n=1, 2 ,3,.... then 1/t1+1/t2+1/t3+....+1/(t(...

    Text Solution

    |

  2. The coefficient of x^(19) in the polynomial (x-1)(x-2)(x-2^2)(x-2^(19)...

    Text Solution

    |

  3. If 1-1/3+1/5-1/7+1/9-1/(11)+=pi/4 , then value of 1/(1xx3)+1/(5xx7)+1/...

    Text Solution

    |

  4. Find the value of p, given that the line y/2 = x – p passes through th...

    Text Solution

    |

  5. If tn denotes the nth term of the series 2+3+6+11+18+...then t(50)...

    Text Solution

    |

  6. The number of positive integral ordered pairs of (a ,b) such that 6,a ...

    Text Solution

    |

  7. Let a ,b >0, let 5a-b ,2a+b ,a+2b be in A.P. and (b+1)^2, a b+1,(a-1)^...

    Text Solution

    |

  8. The difference between the sum of the first k terms of the series ...

    Text Solution

    |

  9. The value of the sum(n=0)^oo(2n+3)/(3^n) is equal to.

    Text Solution

    |

  10. How many two digit numbers are divisible by 3 ?

    Text Solution

    |

  11. If the roots of 10 x^3-n x^2-54 x-27=0 are in harmonic progression...

    Text Solution

    |

  12. The 5th and 8th terms of a geometric sequence of real numbers are 7! ...

    Text Solution

    |

  13. Find the 31st term of an A.P. whose 11th term is 38 and 6th term is 73...

    Text Solution

    |

  14. Find 23rd term of the AP 7, 3, 1, -1, .... ,-3.

    Text Solution

    |

  15. The 5th and 13th term of an A.P are 5 and -3 respectively. Find the A....

    Text Solution

    |

  16. If the sum of the first 14 terms of an AP is 1050 and its first term i...

    Text Solution

    |

  17. The next term of the G.P. x ,x^2+2,a n dx^3+10 is (729)/(16) b. 6 c. 0...

    Text Solution

    |

  18. If x^2+9y^2+25 z^2=x y z((15)/x+5/y+3/z), then x ,y ,a n dz are in a...

    Text Solution

    |

  19. If the sum of n terms of an A.P. is given by Sn=a+b n+c n^2, w h e r ...

    Text Solution

    |

  20. Find the sum of 20th term of the A.P (x+y), (x-y), (x-3y), ....

    Text Solution

    |