Home
Class 11
MATHS
Find the value of sin^(2)5^(@)+sin^(2)10...

Find the value of `sin^(2)5^(@)+sin^(2)10^(@)+sin^(2)15^(@)+.............+sin^(2)90^(@)`.

A

`7(1)/(2)`

B

`8(1)/(2)`

C

`9(1)/(2)`

D

8

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRIC FUNCTIONS OF COMPOUND ANGLES AND FACTORIZATION FORMULAE

    MARVEL PUBLICATION|Exercise MCQs|101 Videos

  • TRIGONOMETRIC FUNCTIONS

    MARVEL PUBLICATION|Exercise MCQs|175 Videos

Similar Questions

Explore conceptually related problems

sin^(2) 75^(@) - sin^(2)15^(@)=

Find the value of sin37(1/2)^(@).sin7 (1/2)^(@)

[sin^(2)5^(0)+sin^(2)10^(0)+sin^(2)15^(0)+...........],[+sin^(2)90^(0)=..........]

Write the value of 2sin 75^(@) sin15^(@)

What is the value of sin^(2) 15^(@) + sin^(2) 20^(@) + sin^(2)25^(@) + ……… + sin^(2) 75^(@) ?

Find the value of sin^(2)(120^(@)-A)+sin^(2)A+sin^(2)(120^(@)+A):

Find the value of sin1^(@).sin2^(@).sin3^(@)…sin180^(@) .

Find the value of (sin^2 33^@ + sin^2 57^@)

sin^(2)5^(@)+sin^(2)10^(@)+sin^(2)15^(@)+ .....+sin^(2)85^(@)+sin^(2)90^(@) is equal to

MARVEL PUBLICATION-TRIGONOMETRIC FUNCTIONS OF COMPOUND ANGLES AND FACTORIZATION FORMULAE-MCQs
  1. If y^c=27^@, then: y= (a) ((20pi)/3)^c (b) ((20pi)/3) (c) ((3pi)/20) (...

    Text Solution

    |

  2. The value of cot5^(@)*cot15^(@)* cot 25^(@)* cot 35^(@)* cot45^(@) * c...

    Text Solution

    |

  3. Find the value of sin^(2)5^(@)+sin^(2)10^(@)+sin^(2)15^(@)+..............

    Text Solution

    |

  4. If tanalpha=(1)/(3)andtanbeta=(1)/(2), then: tan(alpha+beta)=

    Text Solution

    |

  5. If cos e ctheta+cottheta=(11)/2 , then t a ntheta=

    Text Solution

    |

  6. If tantheta=(-1)/(sqrt5)andtheta lies in the fourth quadrant, then: co...

    Text Solution

    |

  7. If sinx+sin^2x=1. then evaluate cos^8x+2cos^6x+cos^4x

    Text Solution

    |

  8. The value of cos 1^@ cos 2^@ cos 3^@... cos 179^@ is

    Text Solution

    |

  9. If tanA=1/2andtanB=1/3, then: A+B= (a) pi/4 (b) 0 (c) pi (d) pi/6

    Text Solution

    |

  10. The sintheta+cosectheta=2, then: sin^2theta+cosec^2theta=

    Text Solution

    |

  11. 8sin.x/8.cos.x/2.cos.x/4.cos.x/8=

    Text Solution

    |

  12. If tantheta+sectheta=sqrt3, then: theta=

    Text Solution

    |

  13. If sinA+sinB+sinC=3. Then: cosA+cosB+cosC= (a) 0 (b) 1 (c) 2 (d) 3

    Text Solution

    |

  14. Let 0<x<pi/4, then (sec2x-tan2x) equals tan(x-pi/4) (b) tan(pi/4-x) ...

    Text Solution

    |

  15. If, in a DeltaABC,tanA=1andtanB=2, then: tanC= (a) 1 (b) 2 (c) 3 (d) 4

    Text Solution

    |

  16. If, in a DeltaABC,tanA=1andtanB=2, then: tanC=

    Text Solution

    |

  17. The value of sin^2 75^0-sin^2 15^0 is 1//2 b. sqrt(3)//2 c. 1 d. 0

    Text Solution

    |

  18. If DeltaABC is a right-angled at A, then: cos^2B+cos^2C=

    Text Solution

    |

  19. sin^6A+cos^6A+3sin^2A.cos^2A=

    Text Solution

    |

  20. If cos(A-B)=3/5and tan A tanB=2, then

    Text Solution

    |