Home
Class 10
MATHS
If sec 4A = cosec(A - 20^@), where 4A is...

If sec 4A = `cosec(A - 20^@)`, where 4A is an acute angle, find the value of A.

Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRY

    BEYOND PUBLICATION|Exercise EXERCISE|209 Videos

  • TANGENTS AND SECANTS TO CIRCLE

    BEYOND PUBLICATION|Exercise EXERCISE|157 Videos

Similar Questions

Explore conceptually related problems

If Cos 4A = Sin(A - 20), when 4A is an acute angle, find the value of A.

If tan 2A = cot(A − 180^(@)) , where 2A is an acute angle. Find the value of A.

If cos 7A =sin (A-6^(@)) , where 7A is an acute angle ,find the value of A .

If tan 2A =cot (A-18^(@) ) where 2A is an acute angle , Find the value of A .

If sec2A=cosec(A-27) , when 2A is an acute angle, then the measure of /_A is

If cosec A = 5/4 then find the value of cot A.

If cosectheta=2 and cottheta=(sqrt3)p where theta is an acute angle, then the value of ‘p’ is

If cos2theta=sin4theta , here 2theta and 4theta are acute angles, then the value of theta is

BEYOND PUBLICATION-TRIGONOMETRY-EXERCISE
  1. sec 70^@.sin 20^@ - cos70^@.cosec 20^@

    Text Solution

    |

  2. tan 22^@ - tan 68^@

    Text Solution

    |

  3. If sec 4A = cosec(A - 20^@), where 4A is an acute angle, find the valu...

    Text Solution

    |

  4. Express: sin 67^@ + cos 75^@ in terms of angles between 0^@ and 45^@.

    Text Solution

    |

  5. Express: sec 76^@ + cosec 52^@ in terms of angles between 0^@ and 45^@...

    Text Solution

    |

  6. Express: tan 65^@ + cot 49^@ in terms of angles between 0^@ and 45^@

    Text Solution

    |

  7. If A , B and C are interior angles of triangle ABC ,then show that sin...

    Text Solution

    |

  8. If A , B and C are interior angles of triangle ABC ,then show that sin...

    Text Solution

    |

  9. If tan theta + cot theta = 2, find the value of tan^2 theta + cot^2 th...

    Text Solution

    |

  10. Show that (cot A + tan B)/(cot B + tan A) = cot A. tan B.

    Text Solution

    |

  11. ((1+ sin theta - cos theta )/( 1+ sin theta + cos theta ))^(2)=

    Text Solution

    |

  12. Show that (cot A - cos A)/(cot A + cos A) = ( cosec A - 1)/(1 + cosec...

    Text Solution

    |

  13. show that 1 + (cot^2 theta/ (1 + cosec theta)) = cosec theta

    Text Solution

    |

  14. show that (1 + cos theta - sin^2 theta)/[(1 + cos theta)sin theta] = c...

    Text Solution

    |

  15. Show that (1 + sin theta)/ cos theta + cos theta / (1 + sin theta) = 2...

    Text Solution

    |

  16. Prove that [(1 + tan^2 theta)cot theta]/(cosec^2 theta) = tan theta

    Text Solution

    |

  17. Prove that (1 + sec theta) / sec theta = sin^2 theta /(1 - cos theta)

    Text Solution

    |

  18. Prove that cos A/(1 - tan A) + sin A /(1 - cot A)= sin A + cos A

    Text Solution

    |

  19. If 5 tan theta= 4, then the value of (5 sin theta - 3 cos theta)/(5 si...

    Text Solution

    |

  20. The value of (2tan30^@)/(1+tan^2 30^@)=

    Text Solution

    |