Home
Class 10
MATHS
Evaluate: ((sin47^@)/(cos43^@))^2+((cos4...

Evaluate: `((sin47^@)/(cos43^@))^2+((cos43^@)/(sin47^@))^2-4cos^2 45^@`

Text Solution

AI Generated Solution

Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRIC IDENTITIES

    RD SHARMA ENGLISH|Exercise All Questions|254 Videos

Similar Questions

Explore conceptually related problems

Evaluate: (tan 47^(@))/(cot 43^(@))

Evaluate: ((sin 77^(@))/(cos 13^(@)))^(2)+((cos 77^(@))/(sin 13^(@)))^(2)-2cos^(2)45^(@)

Evaluate : (tan45^(@))/(2sin30^(@)-cos60^(@))

Evaluate : (i) cos^(2) 25^(@) - sin^(2)65^(@) - tan^(2)45^(@) (ii) ((sin 77)/(cos 13))^(2) + ((cos 77)/(sin 13))^(2) - 2 cos^(2) 45^(@)

Evaluate: ((cos 47^(@))/(sin 43^(@)))^(2)+((sin72^(2))/(cos 18^(@)))^(2)-2cos^(2)45^(@)

Evaluate the following: (i) ((sin35)/(cos55))^2+((cos55)/(sin35))^2-2cos60 (ii) (2cos67)/(sin23)-(tan40)/(cot50)-cos0

Find x, if : sin 47 ^(@) sec 43 ^(@) + cos 43 ^(@) cosec 47 ^(@) - x cos ^(2) 45 ^(@) = 0.

Evaluate cos45^(@)cos30^(@)+sin45^(@)sin30^(@) .

Evaluate : 4(sin^4 30^0+cos^4 60^0)-2/3(sin^2 60^0-cos^2 45^0)+1/2tan^2 60^0

Evaluate : (sec 42^(@))/( cosec 48^(@)) + ( 3 tan 50 ^(@))/( cot 40 ^(@)) - ( 2 cos 43 ^(@))/( sin 47^(@))

RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS-All Questions
  1. Express each of the following in terms of trigonometric ratios of an...

    Text Solution

    |

  2. Evaluate the following: (i) ((sin35)/(cos55))^2+((cos55)/(sin35))^2-...

    Text Solution

    |

  3. Evaluate: ((sin47^@)/(cos43^@))^2+((cos43^@)/(sin47^@))^2-4cos^2 45^@

    Text Solution

    |

  4. If A ,\ B ,\ C are the interior angles of a triangle A B C , prove ...

    Text Solution

    |

  5. Find theta; if sin(theta + 36^@) = cos theta; where theta + 36^@ is a...

    Text Solution

    |

  6. If tan2theta=cot(theta+6^@) , where 2theta and theta+6^@ are acute a...

    Text Solution

    |

  7. If t a n A=cot B , prove that A+B=90^@

    Text Solution

    |

  8. If sec5A=cos e c\ (A+36^@) , where 5A is an acute angle, find the va...

    Text Solution

    |

  9. If s e c4A=cos e c(A-20^@) , where 4A is an acute angle, find the ...

    Text Solution

    |

  10. Evaluate the following: (i) (sin20^@)/(cos70^@) (ii) (cos19^@)/(sin71^...

    Text Solution

    |

  11. Evaluate the following: (i) (sin21o)/(cos69o) (ii) (tan10o)/(cot80o...

    Text Solution

    |

  12. Evaluate the following: (i) ((sin49^@)/(cos41^@))^2+((cos41^@)/(sin4...

    Text Solution

    |

  13. Evaluate the following: (i) (cot40^@)/(tan50^@)-1/2((cos35^@)/(sin55...

    Text Solution

    |

  14. Evaluate the following: (i) (tan35^@)/(cot55^@)+(cot78^@)/(tan12^@)-...

    Text Solution

    |

  15. Evaluate the following: (i) cos e c\ 31^@-sec59^@ (ii) (sin72^@+cos...

    Text Solution

    |

  16. Evaluate the following: (i) sin35osin55o-cos35ocos55o (ii) tan48ot...

    Text Solution

    |

  17. Express each one of the following in terms of trigonometric ratios o...

    Text Solution

    |

  18. Express each one of the following in terms of trigonometric ratios ...

    Text Solution

    |

  19. Express cos75o+cot75o in terms of angles between 0o and 30o .

    Text Solution

    |

  20. If sin3A=cos(A-26^@) , where 3A is an acute angle, find the val...

    Text Solution

    |