Home
Class 11
MATHS
sin(pi/18)*sin(5pi/18)*sin(7pi/18)...

`sin(pi/18)*sin(5pi/18)*sin(7pi/18)`

Text Solution

AI Generated Solution

Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRIC RATIOS OF COMPOUND ANGLES

    RD SHARMA ENGLISH|Exercise All Questions|149 Videos

Similar Questions

Explore conceptually related problems

The value of sin(pi/14)sin(3pi/14)sin(5pi/14)sin(7pi/14)sin(9pi/14)sin(11pi/14)sin(13pi/14) is equal to___________

Value of sin""(pi)/(18)*sin""(5pi)/(18)*sin""(7 pi)/(18) =

If a=sin, pi/18 sin (5pi)/18 si, (7pi)/18, and x is the solution of the equation y=2[x]+2 and y=3[x-2], where [x] denotes the interal part of x then a= (A) [x] (B) 1/[x] (C) 2[x] (D) [x]^2

Prove that: sin(pi/14)sin((3pi)/14)sin((5pi)/14)sin((7pi)/14)sin((9pi)/14)sin((11pi)/14)sin((13pi)/14)=1/(64)

The value of sinpi/(14)sin(3pi)/(14)sin(5pi)/(14)sin(7pi)/(14)sin(9pi)/(14)sin(11pi)/(14)sin(13pi)/(14) is equal to___________

The value of sin(pi/14)sin((3pi)/14)sin((5pi)/14) is

The value of sin(pi/14)sin((3pi)/14)sin((5pi)/14) is

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

let cos(pi/7),cos((3pi)/7),cos((5pi)/7), the roots of equation 8x^3 - 4x^2 - 4x +1=0 then the value of sin(pi/14),sin((3pi)/14),sin((5pi)/14)

The value of the expression 2^199 sin (pi/199)sin((2pi)/199)sin((3pi)/199)………..sin((198pi)/199))=

RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS OF MULTIPLE AND SUBMULTIPLE ANGLES-All Questions
  1. Show that: sin 50^0cos95^0=(sqrt(2)sin35^0-1)/(2sqrt(2))

    Text Solution

    |

  2. Prove that cos((2pi)/(15))cos((4pi)/(15))cos((8pi)/(15))cos((14pi)/(15...

    Text Solution

    |

  3. sin(pi/18)*sin(5pi/18)*sin(7pi/18)

    Text Solution

    |

  4. Prove:cos(pi/15)cos((2pi)/15)cos((3pi)/15)cos((4pi)/15)cos((5pi)/15)co...

    Text Solution

    |

  5. If sinalpha+sinbeta=a and cosalpha+cosbeta=b prove that: cos(alpha-bet...

    Text Solution

    |

  6. If sinalpha+sinbeta=a ,cosalpha+cosbeta=b=>sin(alpha+beta)=

    Text Solution

    |

  7. Prove that sqrt((1-cos2theta)/(1+cos2theta))=tantheta where tantheta>0

    Text Solution

    |

  8. Prove that: (sin2theta)/(1-cos2theta)=cottheta

    Text Solution

    |

  9. Prove that: (sin2theta)/(1+cos2theta)=t a ntheta

    Text Solution

    |

  10. Prove that: \ sqrt(2+sqrt(2+2cos4theta))=2costheta

    Text Solution

    |

  11. Prove :(1+sin2theta-cos2theta)/(1+sin2theta+cos2theta)=tantheta

    Text Solution

    |

  12. Prove that :(sintheta +sin2theta)/(1+costheta+cos2theta)=tantheta

    Text Solution

    |

  13. Prove that: (cos2theta)/(1+sin2theta)=tan(pi/4-theta)

    Text Solution

    |

  14. Prove that: (costheta)/(1+sintheta)=tan(pi/4-theta/2)

    Text Solution

    |

  15. Prove that: sin^2(pi/8)+sin^2((3pi)/8)+sin^2((5pi)/8)+sin^2((7pi)/8)=2

    Text Solution

    |

  16. Prove that: (cosalpha+cosbeta)^2+(sinalpha+sinbeta)^2=4cos^2\ \ ((alph...

    Text Solution

    |

  17. Prove that: 1+cos^2 2theta=2(cos^4theta+sin^4theta)

    Text Solution

    |

  18. Prove that :cos^3 2theta+3cos2theta=4(cos^6theta-sin^6 theta)

    Text Solution

    |

  19. Prove that : (sin3A+sin A)sin A+(cos3A-cos A)cos A=0

    Text Solution

    |

  20. Prove that:cos^2(pi/4-theta)-sin^2(pi/4-theta)=sin2theta

    Text Solution

    |