Home
Class 11
MATHS
Write the value of cos1^0+cos2^0+cos3^0+...

Write the value of `cos1^0+cos2^0+cos3^0++cos 180^0dot`

Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRIC EQUATIONS

    RD SHARMA ENGLISH|Exercise All Questions|120 Videos

  • TRIGONOMETRIC RATIOS OF COMPOUND ANGLES

    RD SHARMA ENGLISH|Exercise All Questions|149 Videos

Similar Questions

Explore conceptually related problems

Find the value of cos12^0+cos84^0+cos156^0+cos132^0

The value of cos (2Cos^-1 0.8) is

If sin x=cos^2x ,\ then write the value of cos^2x\ (1+cos^2x)dot

The value of cos^2 10^0-cos10^0cos50^0+cos^2 50^0 is equal to 4/3 (b) 1/3 (c) 3/4 (d) 3

The value of cos1^@. cos2^@. cos 3^@....cos 179^@= a. 1/sqrt2, b.0, c.1, d.-1

Prove that cos20^0cos40^0cos60^0cos80^0=1/(16)dot

Prove that cos36^0cos72^0cos108^0cos144^0=1/(16)dot

Write the principal value of cos^(-1)(cos680^0)dot

Write the principal value of cos^(-1)[cos(680^0)]dot

The value of cos0 cos1^(@)cos2^(@) ……………. cos179^(@) cos180^(@) is :

RD SHARMA ENGLISH-TRIGONOMETRIC FUNCTIONS-All Questions
  1. A circular wire of radius 15cm is cut and bent so as to lie along the ...

    Text Solution

    |

  2. The value for 2(sin^6theta+cos^6theta)-3(sin^4theta+cos^4theta)+1 is

    Text Solution

    |

  3. Write the value of cos1^0+cos2^0+cos3^0++cos 180^0dot

    Text Solution

    |

  4. If cot(alpha+beta)=0\ ,\ then write the value of "sin"(alpha+2beta) .

    Text Solution

    |

  5. If t a n A+cot A=4, then write the value of t a n^4A+cot^4Adot

    Text Solution

    |

  6. Write the least value of cos^2theta+sec^2thetadot

    Text Solution

    |

  7. If x=sin^(14)theta+cos^(20)theta , then write the smallest interval in...

    Text Solution

    |

  8. If 3sintheta+5costheta=5, then write the value of 5sin theta-3costheta...

    Text Solution

    |

  9. If t a ntheta=x-1/(4x) , then s e ctheta-t a ntheta is equal to (a) -2...

    Text Solution

    |

  10. If pi/2 < theta < (3pi)/2 then sqrt ((1-sin theta)/(1+sin theta))= a. ...

    Text Solution

    |

  11. If pi lt theta lt 2pi then sqrt ((1+cos theta)/(1-cos theta))= a. co...

    Text Solution

    |

  12. If sec theta= x+1/(4x) then sec theta+ tan theta= (a) x, 1/(x), (b) 2x...

    Text Solution

    |

  13. If pi/2ltthetaltpi, then sqrt((1-sintheta)/(1+sintheta))+sqrt((1+sinth...

    Text Solution

    |

  14. If tanθ+secθ=√3,0 <θ<π, then θ is equal to a. (5pi)/6 b. (2pi)/3 c. pi...

    Text Solution

    |

  15. If t a ntheta=-1/(sqrt(5)) and theta lies in the IV quadrant, then the...

    Text Solution

    |

  16. sin^6A+cos^6A+3sin^2A cos^2A=\ a. 0 b. 1 c. 2 d. 3

    Text Solution

    |

  17. If cosec theta- cot theta=1/2, 0 < theta < pi/2 then cos theta= a.5/3,...

    Text Solution

    |

  18. If theta is an acute angle and t a ntheta=1/(sqrt(7)) , then the value...

    Text Solution

    |

  19. sin^(2)5^@+sin^(2)10^@+sin^(2)15^@ +.......+sin^(2)85^@ + sin^(2)90^@=

    Text Solution

    |

  20. If t a n A+cot A=4, then tan^4A+cot^4A is equal to 110 b. 191 c. 80 d....

    Text Solution

    |