Home
Class 10
MATHS
If cos 7A =sin (A-6^(@)) , where 7A is...

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

Promotional Banner

Topper's Solved these Questions

  • TANGENTS AND SECANTS TO A CIRCLE

    VGS PUBLICATION-BRILLIANT|Exercise EXERCISE|201 Videos

  • TRIGONOMETRY (MULTIPLE CHOICE QUESTION)

    VGS PUBLICATION-BRILLIANT|Exercise TRIGONOMETRY (MULTIPLE CHOICE QUESTION)|25 Videos

Similar Questions

Explore conceptually related problems

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

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

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 tan O/ = sqrt3 ( O/ is acute angle) then find the value of 1+cos O/ .

In Delta ABC, if b cos theta = c - a (where theta is an acute angle) , then (c - a) tan theta =

If tan theta = sqrt 3 (theta is acute angle) then find the value of 1 + cos theta .

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

VGS PUBLICATION-BRILLIANT-TRIGONOMETRY-EXERCISE
  1. Check and discuss the above relations in the case of angles between 0°...

    Text Solution

    |

  2. Evaluate (sec 35^(@))/( cosec 55^(@))

    Text Solution

    |

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

    Text Solution

    |

  4. If sin A =cos B , then prove that A+B =90 ^(@)

    Text Solution

    |

  5. Express sin 81^(@) +tan 81^(@) in terms of trigonometric ratio of angl...

    Text Solution

    |

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

    Text Solution

    |

  7. Evaluate (tan 36^(@) )/( cot 54^(@))

    Text Solution

    |

  8. cos 12^(0)- sin 78^(0) =

    Text Solution

    |

  9. Evaluate cosec 31^(@) -sec 59^(@)

    Text Solution

    |

  10. Evaluate sin 15^@.sec 75^@.

    Text Solution

    |

  11. Evaluate tan 26^(@) tan 64^(@)

    Text Solution

    |

  12. Show that tan 48^(@) tan 16^(@) tan42^(@) tan 74^(@) =1

    Text Solution

    |

  13. Show that cos 36^(@) cos 54 ^(@) -sin 36^(@) sin 54^(@) =0

    Text Solution

    |

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

    Text Solution

    |

  15. If tan A =cot B where A and B are acute angles prove that A+B= 90 ^(@...

    Text Solution

    |

  16. If A , B and C are interior angles of a triangle ABC, then show that t...

    Text Solution

    |

  17. Expression sin75^(@) +cos 65^(@) in terms of trigonometric ratios of ...

    Text Solution

    |

  18. For which value of an acute angle theta ,(i) ( cos theta )/( 1-sin th...

    Text Solution

    |

  19. Are these identities true only for 0^(@) le A le 90 ^(@) ? If not ,fo...

    Text Solution

    |

  20. Are these identities true only for 0^(@) le A le 90 ^(@) ? If not ,fo...

    Text Solution

    |