Home
Class 14
MATHS
The value of cot41^(@).cot42^(@).cot47^(...

The value of `cot41^(@).cot42^(@).cot47^(@).cot48^(@).cot49^(@)`.

A

`(sqrt(3))/(2)`

B

`1`

C

`0`

D

`(1)/(sqrt(2))`

लिखित उत्तर

Verified by Experts

The correct Answer is:
b
`cot41^(@).cot42^(@).cot43^(@).cot44^(@)`
`45^(@).cot46^(@)cot47^(@).cot48^(@)`
`cot49^(@)`
`rARr(cot41^(@).cot49^(@)).(cot42^(@).cot48^(@))`
`cot45^(@)(cotA.cotB=1)` (if `A+B=90^(@)`)
Promotional Banner

टॉपर्स ने हल किए ये सवाल

  • TIME, DISTANCE & TRAIN

    RAKESH YADAV|Exercise Exercise|201 Videos
RAKESH YADAV-TRIGONOMETRY-Exercise
  1. The value of sin^(2)22^(@)+sin^(2)68^(@)+cot^(2)30^(@) is

    Text Solution

    |

  2. Find the value of tan4^(@)" "tan 43^(@)" "tan47^(@)" "tan86^(@).

    Text Solution

    |

  3. The value of cot41^(@).cot42^(@).cot47^(@).cot48^(@).cot49^(@).

    Text Solution

    |

  4. निम्नलिखित का मान है? ((tan20^(@))^(2))/((co s ec70^(@))^(2))+((cot2...

    Text Solution

    |

  5. निम्नलिखित का मान है ? ((sin47^(@))/(cos43^(@)))^(2)+((cos43^(@))/(s...

    Text Solution

    |

  6. The value of esxpression sin^(2)1^(@)+sin^(2)11^(@)+sin^(2)21^(@)+si...

    Text Solution

    |

  7. If alpha+beta90^(@) then the expression (tanalpha)/(tanbeta)+sin^(2)...

    Text Solution

    |

  8. यदि cos20^(@)=m और 70^(@)=n है तो m^(2)+n^(2) का मान बताएं

    Text Solution

    |

  9. If sin(90^(@)-theta)+theta=sqrt(2)cos(90^(@)-theta) then the value of ...

    Text Solution

    |

  10. If sinA-cosA=(sqrt(3)-1)/(2), then the value of sinA.cosA is

    Text Solution

    |

  11. If (sec^(2)70^(@)-cot^(2)20^(@))/(2(co s ec^(2)59^(@)-tan^(2)31^(@)))=...

    Text Solution

    |

  12. (tantheta+cottheta)/(tantheta-cottheta)=2,(0 le theta le 90^(@)) है तो...

    Text Solution

    |

  13. If (sintheta+costheta)/(sintheta-costheta)=3 then the value of sin^(4)...

    Text Solution

    |

  14. यदि tan15^(@)=2-sqrt(3), है तो tan15^(@)cot75^(@)+tan75^(@)cot15^(@) ...

    Text Solution

    |

  15. यदि A=tan11^(@)tan29^(@),B=2cot61^(@)cot79^(@) है तो

    Text Solution

    |

  16. यदि tan((pi)/(2)-(theta)/(2))=sqrt(3) है तो का मान ज्ञात करे?

    Text Solution

    |

  17. cosec^(2)18^(@)-(1)/(cot^(2)72^(@)) का मान है ?

    Text Solution

    |

  18. यदि alpha+beta=90^@ है तो (1-sin^(2)alpha)(1-cos^(2)alpha)xx(1+cot^(2)...

    Text Solution

    |

  19. यदि tan9^(@)=(p)/(q) है तो (sec^(2)81^(@))/(1+cot^(@)81^(@)) का मान क...

    Text Solution

    |

  20. The value of following is cos24^(@)+cos55^(@)+cos125^(@)+cos204^(@)+co...

    Text Solution

    |