Home
Class 12
MATHS
The value of cos 1^@ cos 2^@ cos 3^@…..c...

The value of cos `1^@ cos 2^@ cos 3^@`…..cos `179^@` is

A

`1//sqrt(2)`

B

0

C

1

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRY RATIOS AND IDENTITIES

    ML KHANNA|Exercise MISCELLANEOUS EXERCISE (TRUE AND FALSE)|6 Videos

  • TRIGONOMETRY RATIOS AND IDENTITIES

    ML KHANNA|Exercise MISCELLANEOUS EXERCISE (FILL IN THE BLANKS)|6 Videos

  • TRIGONOMETRY RATIOS AND IDENTITIES

    ML KHANNA|Exercise MISCELLANEOUS EXERCISE (COMPREHENSION)|4 Videos

  • TRIGONOMETRICAL EQUATIONS

    ML KHANNA|Exercise SELF ASSESSMENT TEST |27 Videos

Similar Questions

Explore conceptually related problems

Find the value of cos 1^@ cos 2^@ cos 3^@ …….cos 89^@ …..cos 179^@ cos 180^@

Find the vaue of cos 1^@ cos 2^@ cos 3^@ ….cos 88^@ cos 89^@ cos 90^@

The value of cos1^(@)cos2^(@)cos3^(@)...cos179^(@) is

The value of cos1^(@)cos2^(@)cos3^(@)…cos180^(@) is

What is the value of cos1^(@) cos2^(@)cos3^(@).....cos270^(@) ?

The value of cos1^(0)cos2^(0)cos3^(0)cos179^(@) is 1/sqrt(2) b.0 c.1 d.-1

The value of cos0 cos1^(@)cos2^(@) ……………. cos179^(@) cos180^(@) is :

Find the value of cos1^(@).cos2^(@).cos3^(@).cos90^(@)

ML KHANNA-TRIGONOMETRY RATIOS AND IDENTITIES-MISCELLANEOUS EXERCISE (SELF ASSESSMENT TEST)
  1. The value of cos10^(@)-sin 10^(@) is

    Text Solution

    |

  2. The value of cos 1^@ cos 2^@ cos 3^@…..cos 179^@ is

    Text Solution

    |

  3. If sin x + cosec x =2, then sin^(3n) x + cosec ^(3n) x equals

    Text Solution

    |

  4. Which of the following is correct ?

    Text Solution

    |

  5. If tantheta =-4/3, then sin theta is

    Text Solution

    |

  6. Which of the following number (s) is/are rational?

    Text Solution

    |

  7. tan 75^(@) - cot 75^(@)=

    Text Solution

    |

  8. The value of tan 3A - tan 2A - tan A is equal to

    Text Solution

    |

  9. Prove than tan 56^(@) =("cos " 11^(@) + "sin " 11^(@))/("cos " 11^(...

    Text Solution

    |

  10. tan54^(@) can be expressed as

    Text Solution

    |

  11. If 4 n alpha = pi then the value of tan alpha tan 2 alpha tan 3 alpha ...

    Text Solution

    |

  12. The value of sin(45^(@)+theta) - cos(45^(@)-theta) is

    Text Solution

    |

  13. If sintheta=(-4)/(5) and theta lies in third quadrant, then the value...

    Text Solution

    |

  14. If tan theta = 3 and theta lies in thrid quadrant, then the value of s...

    Text Solution

    |

  15. If sin alpha = 12//13 , ( 0 lt alpha lt pi //2) and cos beta = - ( 3)...

    Text Solution

    |

  16. If theta and phi are angles in the first quadrant such that tan theta ...

    Text Solution

    |

  17. The value of cos ( pi //5) cos ( 2pi //5) cos ( 4pi //5) cos ( 8pi //5...

    Text Solution

    |

  18. sin 20^(@) sin 40^(@) sin 60^(@) sin 80^(@) =(3)/(16)

    Text Solution

    |

  19. The value of sqrt3 cosec20^@-sec20^@ is equal to:

    Text Solution

    |

  20. Givent that pi/2,alphaltpi then the expression sqrt((1-sinalpha)/(1+si...

    Text Solution

    |