Home
Class 12
MATHS
The value of "tan"(pi)/(5) +2"tan"(2pi)/...

The value of `"tan"(pi)/(5) +2"tan"(2pi)/(5)+4"cot"(4pi)/(5)` is

A

`"cot"(pi)/(5)`

B

`"cot"(2pi)/(5)`

C

`"cot"(4pi)/(5)`

D

`"cot"(3pi)/(5)`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • QUESTION PAPER 2013

    WB JEE PREVIOUS YEAR PAPER|Exercise MULTIPLE CHOICE QUESTIONS|80 Videos

  • QUESTION PAPER 2015

    WB JEE PREVIOUS YEAR PAPER|Exercise MULTIPLE CHOICE QUESTIONS|80 Videos

Similar Questions

Explore conceptually related problems

The value of tan(pi/3)+2tan((2pi)/3)+4cot((4pi)/3)+8tan((8pi)/3) is

The numerical value of tan(pi/3)+2tan((2pi)/3)+4tan((4pi)/3) is equal to

Find the value of : tan^(-1)("tan"(3pi)/4)

Prove that "tan"(pi)/(12) "tan"(pi)/(16) "tan"(5pi)/(12)"tan"(7pi)/(16)=1

Fill in the blanks : "tan"(pi)/(16) "tan"(3pi)/(16)"tan"(5pi)/(16)"tan"(7pi)/(16)= _________ .

The value of (cos ^(2) ""(pi)/(12)+ cos^(2) ""(pi)/(4)+ cos ^(2) ""(5pi)/(12)) is-

Prove that : "sin"(pi)/(3) "tan"(pi)/(6) +"sin"(pi)/(2) "cos"(pi)/(3) =2 "sin"^(2)(pi)/(4) .

The numbers tan (-(11pi)/(6)), tan((21pi)/(4))and cot ((283pi)/(6)) are in-

Evalute : "sin"^(2)(pi)/(4) + "cos"^(2) (3pi)/(4)+"cos"^(2)(5pi)/(4)+"sin"^(2)(7pi)/(4).

Prove that tan(pi/16)+2tan(pi/8)+4=cot (pi/16) .

WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2014-MULTIPLE CHOICE QUESTIONS
  1. The area of the region bounded by the curves y=x^(2) and x=y^(2) is-

    Text Solution

    |

  2. Let RR be the set of all real numbers and f : R to R be gi...

    Text Solution

    |

  3. The value of "tan"(pi)/(5) +2"tan"(2pi)/(5)+4"cot"(4pi)/(5) is

    Text Solution

    |

  4. Let f(x) be a differentiable function in [2,7]. If f(2)=3 and f'(x)le5...

    Text Solution

    |

  5. If set A contains p elements and set B contains q elements then their ...

    Text Solution

    |

  6. In a Delta ABC , tan A and tanB are the roots of pq(x^(2)+1) =r^(2)x....

    Text Solution

    |

  7. If y=4x+3 is parallel to a tangent to the parabola y^(2)=12x, then ...

    Text Solution

    |

  8. Let the equation of an ellipse be (x^(2))/(144)+(y^(2))/(25)=1. Then ...

    Text Solution

    |

  9. The straight lines x+y=0, 5x+y=4 and x+5y=4 form

    Text Solution

    |

  10. If sin^(-1)((x)/(13))+"cosec"^(-1)((13)/(12)) =(pi)/(2), then the valu...

    Text Solution

    |

  11. The values of lambda for which the curve (7x+5)^(2)+(7y+3)^(2)=lambda^...

    Text Solution

    |

  12. Let f(x)=x+1//2. Then the number of real values of x for which the t...

    Text Solution

    |

  13. Let f(x)=2x^(2)+5x+1. If we write f(x) as f(x)=a(x+1)(x-2)+b(x-2) (...

    Text Solution

    |

  14. If alpha, beta are the roots of ax^(2)+bx+c=0 (a ne 0) and a+h, beta +...

    Text Solution

    |

  15. Let p, q be real numbers . If alpha is the root of x^(2)+3p^(2)x+5q^(...

    Text Solution

    |

  16. The equation of the common tangent with positive slope to the parabola...

    Text Solution

    |

  17. The point on the parabola y^(2)=64x which is nearest to the line 4x+3y...

    Text Solution

    |

  18. Let z(1),z(2) be two fixed complex numbers in the Argand plane an...

    Text Solution

    |

  19. The function f(x)=(tan{pi[x-(pi)/(2)]})/(2+[x]^(2)) , where [x] denote...

    Text Solution

    |

  20. The function f(x)=a sin|x| +be^(|x|) is differentiable at x = 0 when

    Text Solution

    |