Home
Class 10
MATHS
Express each of the following in term...

Express each of the following in terms of trigonometric ratios of angles between `0o` and `45o` : `sin81o+tan81o` (ii) `sin72o+cot72o`

Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRIC IDENTITIES

    RD SHARMA|Exercise All Questions|254 Videos

Similar Questions

Explore conceptually related problems

Express each of the following in terms of trigonometric ratios of angles between 0o and 450:sin85o+cos ec85o( ii) tan68o+sec68o (iii) cos ec69o+cot69o

Express each one of the following in terms of trigonometric ratios of angles lying between 0o and 45o sin59o+cos56o (ii) tan65o+cot49o (iii) sec76o+cos e c 52o

Express each one of the following in terms of trigonometric ratios of angles lying between 0o and 45o cos78o+sec78o (ii) cos e c 54o+sin72o (iii) cot85o+cos75o (iv) sin67o+cos75o

Express cot85^(@)+cos75^(@) in terms of trigonometric ratios of angles between 0^(o) and 45^(@)

Express each of the following in terms of trigonometric ratios of angles between 0^(@)and 45^(@) (i) sin70^(@)+sec70^(@) " " (ii) tan65^(@)+"cosec "65^(@) " " (iii) cos81^(@)+cot80^(@)

Express sin67^(@)+cos75^(@) in terms of trigonometric ratios of angles between 0^(@) and 45^(@)

Express cos70^(@)+sin70^(@)+tan65^(@) in terms of trigonometric ratios of angles lying between 0^(@)and45^(@)

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

Express the trigonometric ratios sin A, sec A and tan A in terms of cot A.

RD SHARMA-TRIGONOMETRIC RATIOS-All Questions
  1. Prove that: (i) sin35osin55o-cos35ocos55o=0 (ii) (cos70o)/(sin20o)...

    Text Solution

    |

  2. Express each of the following in terms of trigonometric ratios of a...

    Text Solution

    |

  3. Express each of the following in terms of trigonometric ratios of a...

    Text Solution

    |

  4. Evaluate the following: (i) ((sin35o)/(cos55o))^2+((cos55o)/(sin35o...

    Text Solution

    |

  5. Evaluate: ((sin47o)/(cos43o))^2+((cos43o)/(sin47o))^2-4cos^2 45o

    Text Solution

    |

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

    Text Solution

    |

  7. Dind theta; if sin(theta + 36^@) = cos theta; where theta + 36 is an ...

    Text Solution

    |

  8. If tan2theta=cot(theta+6o) , where 2theta and theta+6o are acute an...

    Text Solution

    |

  9. If t a n A"\ "="\ "cot B , prove that A+B=90o

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  14. Evaluate the following: (i) ((sin49o)/(cos41o))^2+((cos41o)/(sin49o...

    Text Solution

    |

  15. Evaluate the following: (i) (cot40o)/(tan50o)-1/2((cos35o)/(sin55o)...

    Text Solution

    |

  16. Evaluate the following: (i) (tan35o)/(cot55o)+(cot78o)/(tan12o)-1 ...

    Text Solution

    |

  17. Evaluate the following: (i) cos e c\ 31o-sec59o (ii) (sin72o+cos18...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |