Home
Class 11
MATHS
sin^2 5^@+sin^2 10^@ + sin^2 15^@+.........

`sin^2 5^@+sin^2 10^@ + sin^2 15^@+.........+sin^2 85^@+sin^2 90^@` equals to

A

7

B

8

C

9

D

`9 1/2`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • 3D-GEOMETRY

    PATHFINDER|Exercise QUESTION BANK|39 Videos

  • BINOMIAL THEOREM

    PATHFINDER|Exercise QUESTION BANK|225 Videos

Similar Questions

Explore conceptually related problems

(sin^2 1^@ + sin^2 3^@ + sin^2 5^@ + ………………… + sin^2 85^@ + sin^2 87^@ + sin^2 89^@) equals____

[sin^2 1^@ + sin^2 2^@ +sin^2 3^@ + ……………….. + sin^2 87^@ + sin^2 88^@ + sin^2 89^@] equals____

2sin40^@sin10^@ =

2 sin 40^(@) sin 10^(@)=

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

Show that sin^2 5^0+sin^2 10^0+sin^2 15^0+....+sin^2 90^0=9 1/2dot

(sin^2 22^@ + sin^2 68^@ + cot^2 68^@) equals___

The value of sin^2 12^0+sin^2 21^0+sin^2 39^0+sin^2 48^0-sin^2 9^0-sin^2 18^0 is _______

Show that sin^(2) 12^(@)+ sin ^(2)21^(@)+ sin ^(2)39^(@)+ sin^(2)48^(@)=1+ sin^(2)9^(@)+ sin^(2)18^(@)

2sin^(2)x + sin^(2)2x =2

PATHFINDER-BASIC MATHEMATICS-QUESTION BANK
  1. Solution set of x satisfying abs(x-1)+abs(x-2)+abs(x-3)ge6 is

    Text Solution

    |

  2. The solution set of these equation 2^absy-abs(2^(y-1)-1)=2^(y-1)+1

    Text Solution

    |

  3. sin^2 5^@+sin^2 10^@ + sin^2 15^@+.........+sin^2 85^@+sin^2 90^@ equa...

    Text Solution

    |

  4. If sinA+sinB+sinC=3, then the value of cosA+cosB+cosC is equal to

    Text Solution

    |

  5. If theta in (-pi, 2 pi) then the interval in which cos theta gt0 is

    Text Solution

    |

  6. The value of sin 750^@- sin(-750^@)+cos 339^@-cos(-339^@) is equal to

    Text Solution

    |

  7. If sqrt(1-sinA)= "sin" A/2-"cos" A/2, then A/2 - pi/4 could lie in qua...

    Text Solution

    |

  8. Prove that tan 1^@ tan 2^@ tan 3^@........ tan 88^@tan89^@=1

    Text Solution

    |

  9. Prove that sin10^@+sin20^@+sin30^@+.........+sin360^@=0

    Text Solution

    |

  10. Prove that tanAcdottan(A+60^@)+tanAcdottan(A-60^@)+tan(A+60^@)tan(A-60...

    Text Solution

    |

  11. If the angle theta be divided into two parts such that the tangent of ...

    Text Solution

    |

  12. If cos theta+ cos^2 theta=1, prove that sin^12 theta+3sin^10 theta+3s...

    Text Solution

    |

  13. Evaluate : lim(x rarr 0)(3sin^-1 x)/(4(e^x-1))

    Text Solution

    |

  14. Evaluate : lim(x rarr 0)log(1+5 x)/(e^(2x)-1)

    Text Solution

    |

  15. Evaluate : lim(xrarr0) (sin(1+x)-sin(1-x))/x

    Text Solution

    |

  16. Evaluate : lim(xrarr0) (tanx-sinx)/x^3

    Text Solution

    |

  17. Differentiate the following functions w.r.t.'x' : cossqrt((x^2+3x+4)...

    Text Solution

    |

  18. Differentiate the following functions w.r.t.'x' : (xsin^-1x)/(sqrt(1...

    Text Solution

    |

  19. Differentiate the following functions w.r.t.'x' : log (sin (logx))

    Text Solution

    |

  20. Differentiate the following functions w.r.t.'x' : e^(3sqrtax)

    Text Solution

    |