Home
Class 14
MATHS
The value of esxpression sin^(2)1^(@)+...

The value of esxpression
`sin^(2)1^(@)+sin^(2)11^(@)+sin^(2)21^(@)+sin^(2)31^(@)+sin^(2)41^(@)+sin^(2)45^(@)+sin^(2)49^(@)+sin^(2)59^(@)+sin^(2)69^(@)+sin^(2)79^(@)+sin^(2)89^(@)` is

A

0

B

`5(1)/(2)`

C

`4(1)/(2)`

D

5

लिखित उत्तर

Verified by Experts

The correct Answer is:
b

`sin^(2)1+sin^(2)11^(@)+sin^(2)21^(@)+sin^(2)31^(@)+sin^(2)41^(@)+sin^(2)45^(@)+sin^(@)49+sin^(2)59^(@)+sin^(2) 69^(@)+sin^(2)79^(@)+sin^(2)89^(@)`
`rArr(sin^(2)79^(@))+sin^(2)89^(@))+(sin^(2)11^(@)+sin^(2)8=79^(@) )+(sin^(2)21 ^(@)+sin^(@)69^(@))+(sin^(2)31^(@)+sin^(2)59^(@))+(sin^(2)41^(@)+sin^(2)49^(@))+sin^(2)45^(@)`
`rArr1+1+1+1+(1)/(2)`
`(sin^(2)A+sin^(2)B=1`
if `A+B=90^(@))rArr5(1)/(2)`
Promotional Banner

टॉपर्स ने हल किए ये सवाल

  • TIME, DISTANCE & TRAIN

    RAKESH YADAV|Exercise Exercise|201 Videos
RAKESH YADAV-TRIGONOMETRY-Exercise
  1. निम्नलिखित का मान है? ((tan20^(@))^(2))/((co s ec70^(@))^(2))+((cot2...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  18. यदि 2(cos^(2)theta-sin^(2)theta)=1,theta है और धनात्मक न्यूनकोण है तो...

    Text Solution

    |

  19. यदि 7sin^(2)theta+3cos^(2)theta=4,(0^(@) le theta le 90^(@)) है theta...

    Text Solution

    |

  20. यदि tan(2theta+45^(@))=cot3theta जहाँ (2theta+45^(@)) और 3theta न्यून...

    Text Solution

    |