Home
Class 11
MATHS
Prove that:tan6^0tan42^0tan66^0tan78^0=1...

Prove that:`tan6^0tan42^0tan66^0tan78^0=1.`

Text Solution

Verified by Experts

The correct Answer is:
1
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

Prove that: tan6^(0)tan42^(0)tan66^(@)tan78^(@)=1

Prove that: tan10^0tan15^0tan75^0tan80^0=1 tan1^0tan2^0tan3^0tan89^0=1 cos1^0cos2^0cos3^0cos180^0=0

value of tan6^0tan42^0tan66^0tan78^0 is equal to - a) 1 b) 2 c) 1/4 d) 1/8

The value of tan6^(@)tan42^(@)tan66^(@)tan78^(@) is (a) 1 (b) (1)/(2)(c)(1)/(4)(d)(1)/(8)

Show that tan1^(0)tan2^(0)...tan89^(@)=1

Prove that :(tan69^(@)+tan66^(@))/(1-tan69^(@)tan66^(@))=-1

If (cos (AB)) / (cos (A + B)) + (cos (C + D)) / (cos (CD)) = 0 Prove that tan A tan B tan C tan D = -1

The value of tan 6^(@) tan 42^(@) tan 66^(@) tan 78^(@) is

tan9^(0)-tan27^(0)-tan63^(@)+tan81^(@)

MARVEL PUBLICATION-TRIGONOMETRIC FUNCTIONS OF COMPOUND ANGLES AND FACTORIZATION FORMULAE-MCQs
  1. Prove that:tan6^0tan42^0tan66^0tan78^0=1.

    Text Solution

    |

  2. sin10 5^(@)+cos10 5^(@)=

    Text Solution

    |

  3. sin((pi)/(3)+A).cos((pi)/(3)+B)-cos((pi)/(3)+A).sin((pi)/(3)+B)=...

    Text Solution

    |

  4. If 0 ltA lt(pi//2)and0 ltB lt(pi//2), then angle (A-B) lies in…….. Qua...

    Text Solution

    |

  5. If 0 ltA lt(pi//2)and0 ltB lt(pi//2), then angle (A-B) lies in…….. Qua...

    Text Solution

    |

  6. If sinA=3//5 andcosB=9//41, where A,B are both in the first quadrant, ...

    Text Solution

    |

  7. If sinalpha=15//17, (pi//2) ltalpha ltpi and secbeta=13//12, (3pi//2)...

    Text Solution

    |

  8. If tanalpha=3//4 ,alpha in third quadrant, and cosbeta=9//41,beta, in ...

    Text Solution

    |

  9. If sintheta=1//2,cosphi=12//13, where theta lies in the second quadran...

    Text Solution

    |

  10. For any angles A and B, sin(A+B). sin(A-B)=......

    Text Solution

    |

  11. For any angles A and B, cos(A+B).cos(A-B)=…..

    Text Solution

    |

  12. 1+tanA.tan(A//2)=…..

    Text Solution

    |

  13. ( tan3A + tanA)/(tan3A -tan A)=..

    Text Solution

    |

  14. For any angles A,B,C. (sin(A-B))/(cosA.cosB)+(sin(B-C))/(cosB.cosC)+(s...

    Text Solution

    |

  15. sinx+cosx=sqrt2.sin(....)

    Text Solution

    |

  16. cosx-sinx=sqrt2.cos(....)

    Text Solution

    |

  17. tan20^@+tan25^@+tan20^@.tan25^@=....

    Text Solution

    |

  18. tan4 0^@+2tan1 0^@ is equal to

    Text Solution

    |

  19. If A+B=45^@ then (1+tanA)(1+tanB)=

    Text Solution

    |

  20. If 2sin(x+60^@)=cos(x-30^@), then : tan=…..

    Text Solution

    |

  21. tan(45^(@)+A)tan(45^(@)-A)=

    Text Solution

    |