Home
Class 11
MATHS
If 90^(@) lt A lt 180^(@) and sin A =4/5...

If `90^(@) lt A lt 180^(@) and sin A =4/5, then tan ""A/2` is equal to

A

`1/2`

B

`3/5`

C

`3/2`

D

2

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRIC FUNCTIONS OF COMPOUND ANGLES

    TARGET PUBLICATION|Exercise EVALUATION TEST|12 Videos

  • TRIGONOMETRIC FUNCTIONS OF COMPOUND ANGLES

    TARGET PUBLICATION|Exercise CRITICAL THINKING|60 Videos

  • STRAIGHT LINE

    TARGET PUBLICATION|Exercise EVALUATION TEST|10 Videos

  • TRIGONOMETRIC FUNCTIONS

    TARGET PUBLICATION|Exercise EVALUATION TEST|10 Videos

Similar Questions

Explore conceptually related problems

If90 ^ (@)

If 90^(@) lt A lt 180^(@) and 3cosA+2=0 . Then quadratic equation whose roots are sin A and tan A, is

If 0^@ lt A lt 90^@ and sin A= 4/5 , find the value of tan A + sec A ?

If Cos A =(sqrt(3))/(2), 0^(@) lt A lt 90^(@) , then A is equal to

If sin A = 3/5 , where 450^@ lt A lt 540^@ , then cos A/2 is equal to:

If theta^(@) lt theta lt 90^(@) and (sin theta)/(cos theta) + (cos theta)/(sin theta)=2 , then which of the following is equal to theta ?

If sin A=(1)/(2) and 90^(@) lt A lt 180^(@) , then the value of a in circular measure is ________

If 0^(@) lt theta lt 90^(@) and cos^(2) theta - sin^(2) theta = (1)/(2) , then what is the value of theta ?

If 0^(@) lt theta lt 90^(@) and cos^(2) theta - sin^(2) theta = 1/2 ,then value of theta is?

If sin alpha=336/625 and 450^(@) lt alpha lt 540^(@) ,then sin((alpha)/(4)) is equal to

TARGET PUBLICATION-TRIGONOMETRIC FUNCTIONS OF COMPOUND ANGLES -COMPETITIVE THINKING
  1. tan ((pi)/(4) + (theta)/(2)) + tan ((pi)/(4) -(theta)/(2)) is equal to

    Text Solution

    |

  2. If tan x = 3/4, pi lt x lt (3pi)/(2), then the value of cos ""x/2 is

    Text Solution

    |

  3. If 90^(@) lt A lt 180^(@) and sin A =4/5, then tan ""A/2 is equal to

    Text Solution

    |

  4. If theta is an acute angle and sin((theta)/(2))=sqrt((x-1)/(2x)) ,then...

    Text Solution

    |

  5. If tan(x/2)=cosec x - sin x then the value of tan^2(x/2) is

    Text Solution

    |

  6. If cos theta =(cos alpha - cos beta)/( 1- cos alpha cos beta), then on...

    Text Solution

    |

  7. If theta in ((pi)/(2), (3pi)/(2)), then the value of sqrt(4 cos ^(4) t...

    Text Solution

    |

  8. (m+2)sintheta+(2m-1)costheta=2m+1 then tan theta is

    Text Solution

    |

  9. Given that cos ((alpha -beta)/(2)) = 2 cos ((alpha+ beta)/(2)), then ...

    Text Solution

    |

  10. What is tan(7(1)/(2))^(@) equal to ?

    Text Solution

    |

  11. sqrt2+ sqrt3+sqrt4+sqrt6 is equal to

    Text Solution

    |

  12. If alpha=22^@30', then (1+cos alpha)(1+cos3alpha)(1+cos5alpha)(1+co...

    Text Solution

    |

  13. If tan A= (1- cos B)/(sin B), then tan 2A is equal to

    Text Solution

    |

  14. If cosectheta=(p+q)/(p-q),then cot(pi,//4+theta//2)=

    Text Solution

    |

  15. (sqrt2 - sin alpha - cos alpha )/( sin alpha - cos alpha)=

    Text Solution

    |

  16. cos 2 (theta+ phi) +4 cos (theta + phi ) sin theta sin phi + 2 sin ^(2...

    Text Solution

    |

  17. lf sintheta+sinphi =a and costheta + cosphi = b, find the value of tan...

    Text Solution

    |

  18. The value of expression (1+ sin 2 alpha)/(cos (2 alpha -2pi) tan (al...

    Text Solution

    |

  19. Let f : (-1, 1) -> R be such that f(cos4theta) = 2/(2-sec^2theta for t...

    Text Solution

    |

  20. Let fn(Theta)=(tan(Theta/2))(1 +sec(Theta))(1+sec(2Theta)).....(1+sec(...

    Text Solution

    |