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

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

A

`0`

B

`1`

C

`1//sqrt(2)`

D

`-1`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • TRIGNOMETRIC RATIOS & IDENTITIES

    MOTION|Exercise Exercise 2(Level -I)|36 Videos

  • TRIGNOMETRIC RATIOS & IDENTITIES

    MOTION|Exercise Exercise -2(Level -II)|12 Videos

  • TRIGNOMETRIC RATIOS & IDENTITIES

    MOTION|Exercise Exercise -4(Level -II)|9 Videos

  • THREE DIMENSIONAL GEOMETRY (3 -D)

    MOTION|Exercise SOLVED EXAMPLE|33 Videos

  • TRIGONOMETRIC EQUATION

    MOTION|Exercise EXERCISE 4|10 Videos

Similar Questions

Explore conceptually related problems

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

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

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

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

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

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

The value of cos1^(@) cos 2^(@) ..............cos179^(@) is

The value of cos1^(@). Cos2^(@)……….. Cos179^(@) is

MOTION-TRIGNOMETRIC RATIOS & IDENTITIES -Exercise 1
  1. The value of sin(pi+theta)sin(pi-theta)cosec^(2)theta is equal to

    Text Solution

    |

  2. The value of tan1^@ tan 2^@ tan 3^@ ... tan 89^@ is

    Text Solution

    |

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

    Text Solution

    |

  4. If sin alpha sin beta - cos alpha cos beta + 1=0, then the value of 1+...

    Text Solution

    |

  5. The value of cotx+cot(60^@+x)+cot(120^@+x) is equal to

    Text Solution

    |

  6. If tan A - tan B =x and cot B - cot A=y, then: cot(A-B)=

    Text Solution

    |

  7. If tan 25^@ = x, then (tan155^@ - tan115^@)/(1+tan 155^@ tan115^@) is ...

    Text Solution

    |

  8. Let alpha, beta be such that pi lt alpha lt beta lt 3pi, if sin alpha...

    Text Solution

    |

  9. The value of tan 3A -tan 2A -tan A is equal to (A) tan 3A tan 2A tan A...

    Text Solution

    |

  10. If alpha+beta+gamma=2pi , then

    Text Solution

    |

  11. In a triangle ABC if tan A lt 0 then

    Text Solution

    |

  12. If A+B=225^(@) then the value of (cotA)/(1+cotA).(cotB)/(1+cotB) is

    Text Solution

    |

  13. The value of (sin 24^@ cos 6^@-sin 6^@sin 66^@)/(sin 21^@ cos 39^@-cos...

    Text Solution

    |

  14. The valud of sin 12^(@) sin 48^(@) sin 54^(@) is equal to-

    Text Solution

    |

  15. If A + B + C = (3pi)/2, then cos 2A + cos 2B + cos 2C is equal to (A) ...

    Text Solution

    |

  16. The expression (cos 6x+6cos 4x+15 cos 2x+10)/(cos 5x+5 cos 3x+10 co...

    Text Solution

    |

  17. The value of cos10^(@)-sin 10^(@) is

    Text Solution

    |

  18. If 0 lt x lt pi and cos x + sin x = 1/2, then tan x is

    Text Solution

    |

  19. If A lies in the third quadrant and 3 tan A-4 = 0, then 5 sin 2A + 3si...

    Text Solution

    |

  20. For -pi/2 lt theta lt pi/2 ,(sin theta + sin 2 theta)/(1+cos theta + c...

    Text Solution

    |