Home
Class 11
MATHS
Prove that, sin^(2)((pi)/(18))+sin^(2)...

Prove that,
`sin^(2)((pi)/(18))+sin^(2)((pi)/(9))+sin^(2)((7pi)/(18))+sin^(2)((4pi)/(9))=2`

Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRIC FUNCTIONS

    KUMAR PRAKASHAN|Exercise TEXTBOOK BASED MCQS|60 Videos

  • TRIGONOMETRIC FUNCTIONS

    KUMAR PRAKASHAN|Exercise TEXTBOOK ILLUSTRATIONS FOR PRACTICE WORK|33 Videos

  • TRIGONOMETRIC FUNCTIONS

    KUMAR PRAKASHAN|Exercise MISCELLANEOUS EXERCISE : 3|10 Videos

  • STRAIGHT LINES

    KUMAR PRAKASHAN|Exercise Question of Module (Knowledge Test :)|18 Videos

Similar Questions

Explore conceptually related problems

sin^(2)((pi)/(8))+sin^(2)((3pi)/(8))+sin^(2)((5pi)/(8))+sin^(2)((7pi)/(8))= .........

Prove that : 2sin^(2)((3pi)/(4))+2cos^(2)((pi)/(4))+2sec^(2)((pi)/(3))=10

Prove that : 2sin^(2)((pi)/(6))+coesec^(2)((7pi)/(6))cos^(2)((pi)/(3))=(3)/(2)

Prove that : sin^(2)((pi)/(6))+cos^(2)((pi)/(3))-tan^(2)((pi)/(4))=-(1)/(2)

Prove that, sin^(2)((pi)/(8)+(A)/(2))-sin^(2)((pi)/(8)-(A)/(2))=(1)/(sqrt(2))sinA

The value of sin((pi)/(18))+sin((pi)/(9))+sin((2pi)/(9))+sin((5pi)/(18)) is

Prove that 2sin^(2)""(pi)/(6)+cosec^(2)""(7pi)/(6) cos^(2)""(pi)/(3)=(3)/(2)

sin((pi)/(16))sin((3pi)/(16))sin((5pi)/(16))sin((7pi)/(16))= ………..

Prove that, 3sin((pi)/(6))sec((pi)/(3))-4sin((5pi)/(6))cot((pi)/(4))=1 .

Prove that, sin^(3)A+sin^(3)((2pi)/(3)+A)+sin^(3)((4pi)/(3)+A)=-(3)/(4)sin3A

KUMAR PRAKASHAN-TRIGONOMETRIC FUNCTIONS -PRACTICE WORK
  1. Prove that, cos510^(@)cos330^(@)+sin390^(@)cos120^(@)=-1.

    Text Solution

    |

  2. Prove that, sin((8pi)/(3))cos((23pi)/(6))+cos((13pi)/(3))sin((35pi)/...

    Text Solution

    |

  3. Prove that, sin^(2)((pi)/(18))+sin^(2)((pi)/(9))+sin^(2)((7pi)/(18))...

    Text Solution

    |

  4. Find the value of x. cosec(90^(@)+theta)+xcosthetacot(90^(@)+theta)=...

    Text Solution

    |

  5. Find the value of x. xcot(90^(@)+theta)+tan(90^(@)+theta)sintheta+co...

    Text Solution

    |

  6. Find the value of following trigonometric function. tan(-585^(@))

    Text Solution

    |

  7. Find the value of following trigonometric function. sin(4530^(@))

    Text Solution

    |

  8. Find the value of following trigonometric function. tan((11pi)/(6))

    Text Solution

    |

  9. Find the value of following trigonometric function. cos(1755^(@))

    Text Solution

    |

  10. Find the value of following trigonometric function. sin(-330^(@))

    Text Solution

    |

  11. Prove that cos((3pi)/(2)+x)cos(2pi+x).{cot((3pi)/(2)-x)+cot(2pi+x)}=1

    Text Solution

    |

  12. Find the value of sin(135^(@))cosec(225^(@))tan(150^(@))cot(315^(@))

    Text Solution

    |

  13. Prove that, 3sin((pi)/(6))sec((pi)/(3))-4sin((5pi)/(6))cot((pi)/(4))...

    Text Solution

    |

  14. Prove tan((11pi)/(3))-2sin((4pi)/(6))-((3)/(4))cosec^(2)((pi)/(4))+4co...

    Text Solution

    |

  15. Find the value of cos75^(@)

    Text Solution

    |

  16. Find the value of tan75^(@)

    Text Solution

    |

  17. Find the value of sin15^(@)

    Text Solution

    |

  18. Find the value of sec105^(@)

    Text Solution

    |

  19. Prove that, sin(40^(@)+theta)cos(10^(@)+theta)-cos(40^(@)+theta)sin(10...

    Text Solution

    |

  20. Prove that, (tanA+tanB)/(tanA-tanB)=(sin(A+B))/(sin(A-B))

    Text Solution

    |