Home
Class 12
MATHS
The value of 2tan18^@+3sec18^@-4cos18^@ ...

The value of `2tan18^@+3sec18^@-4cos18^@` is

A

Zero

B

`sqrt(5)`

C

`-sqrt(5)`

D

`sqrt(3)`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • TRIGNOMETRIC FUNCTIONS

    AAKASH INSTITUTE|Exercise Section-C (Objective Type Questions More than one options are correct )|45 Videos
  • TRIGNOMETRIC FUNCTIONS

    AAKASH INSTITUTE|Exercise Section D (Linked Comprehension Type Questions)|24 Videos
  • TRIGNOMETRIC FUNCTIONS

    AAKASH INSTITUTE|Exercise Assignment Section-B (Objective Type Questions (One option is correct))|1 Videos
  • THREE DIMENSIONAL GEOMETRY

    AAKASH INSTITUTE|Exercise ASSIGNMENT SECTION - J|10 Videos
  • VECTOR ALGEBRA

    AAKASH INSTITUTE|Exercise SECTION-J (Aakash Challengers Questions)|5 Videos

Similar Questions

Explore conceptually related problems

the value of sin78^(@)-sin18^(@)+cos132^(@) is

What is the value of tan18^(@) ?

The value of 4 cos 18^(@)-(3)/(cos 18^(@))-2 tan 18^(@) is equal to

If cos x=tan y,cos y=tan z,cos z=tan x then the value of sin x is (a)2cos18^(0)(b)cos18^(0)(c)sin18^(0)(d)2sin18^(@)

Find the value of (tan 42^@ + tan 18^@)/(1-tan 42^@ tan 18^@)+ tan 300^@

Evaluate the following: sin 78^@ cos 18^@-cos 78^@ sin 18^@

The value of csc(pi)/(18)-4sin(7 pi)/(18) is

What is the value of sin 18^@ cos 36^@ ?

Find the value of : -6-3-(-18)

find the value of sin18^(0) and cos36^(@)

AAKASH INSTITUTE-TRIGNOMETRIC FUNCTIONS -Section-B (Objective Type Questions One option is correct)
  1. The value of tan7 1/2^@ equal to

    Text Solution

    |

  2. If tanalpha=sqrt(a), where a is a rational number whch is not a perfec...

    Text Solution

    |

  3. The value of 2tan18^@+3sec18^@-4cos18^@ is

    Text Solution

    |

  4. If tan^2alpha-2tan^2beta=1 then which of the following options is corr...

    Text Solution

    |

  5. The value of tan10^@tan50^@tan70^@ is

    Text Solution

    |

  6. If the arcs of the same length in two circles subtend angles 65 and 11...

    Text Solution

    |

  7. If cos2x+2cosx=1 then sin^2x(2-cos^2x) is

    Text Solution

    |

  8. The value of tan(theta/2)(1+sectheta)(1+sec2theta)+(1+sec2^2theta).......

    Text Solution

    |

  9. The value of [100(x-1)] is where [x] is the greatest integer less tha...

    Text Solution

    |

  10. If alpha+beta=pi/2a n dbeta+gamma=alpha, then tanalpha equals 2(tanbet...

    Text Solution

    |

  11. If f(alpha,beta)=cos^2alpha+sin^2alphacos2beta then which of the follo...

    Text Solution

    |

  12. Let f(x)=cos10x+cos8x+3cos4x+3cos2x and g(x)=8cosxcos^3(3x) then for a...

    Text Solution

    |

  13. Prove that sum(r=1)^n(1/(costheta+"cos"(2r+1)theta))=(sinntheta)/(2sin...

    Text Solution

    |

  14. Find the square root of 5-12i

    Text Solution

    |

  15. Given that sum(k=1)^35 sin5k^@ = tan(m/n)^@ , where m and n are relat...

    Text Solution

    |

  16. For -pi/2 lt theta lt pi/2, (sintheta + sin 2theta)/(1+costheta + cos2...

    Text Solution

    |

  17. If A + B + C = pi and sin(A +C/2)= ksin(C/2) , then tan(A/2).tan(B/2)...

    Text Solution

    |

  18. If A+B+C=pi, and cosA=cosB*cosC then tanB*tanC has the value equal to ...

    Text Solution

    |

  19. If sqrt3 sectheta+2=0 , then principal value of theta may be

    Text Solution

    |

  20. The number of solutions of the equation 2 tan^2theta-7sec theta-2 = 0 ...

    Text Solution

    |