Home
Class 10
MATHS
Evaluate the following: (i) (sin20^@)/(c...

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

Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRIC IDENTITIES

    RD SHARMA ENGLISH|Exercise All Questions|254 Videos

Similar Questions

Explore conceptually related problems

Evaluate the following: (i) ((sin49^@)/(cos41^@))^2+((cos41^@)/(sin49^@))^2 (ii) cos48^@-sin42^@

Evaluate the following: (i) (cot40^@)/(tan50^@)-1/2((cos35^@)/(sin55^@)) (ii) ((sin27^@)/(cos63^@))^2-((cos63^@)/(sin27^@))^2

Evaluate the following: (i) (tan35^@)/(cot55^@)+(cot78^@)/(tan12^@)-1 (ii) (sec70^@)/(cos e c\ 20^@)+(sin59^@)/(cos31^@)

Evaluate the following: i) cos120^(@)sin390^(@)+cos330^(@)cos150^(@) ii) sin^(2)(3pi)/(4)+cos^(2)pi/4+sec^(2)pi/3

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

Evaluate the following: (i) cos e c\ 31^@-sec59^@ (ii) (sin72^@+cos18^@)(sin72^@-cos18^@)

Evaluate each of the following: (i) sin^(-1)(sin(-600^o)) (ii) \ cos^(-1)(cos(-680^o))

Evaluate each of the following: sin(sin^(-1)7/(25)) (ii) sin(cos^(-1)5/(13)) (iii) sin(tan^(-1)(24)/7)

Evaluate the following: (i) 4/(cot^2 30o)+1/(sin^2 60o)-cos^2 45o (ii) 4(sin^4 30o+cos^2 60o)-3(cos^2 45o-sin^2 90o)-sin^2 60o

Evaluate the following: (i) sec50^osin40^o + cos40^o\ cos e c\ 50^o (ii) sec70^osin20^o-cos20^o\ cos e c\ 70^o

RD SHARMA ENGLISH-TRIGONOMETRIC RATIOS-All Questions
  1. If sec5A=cos e c\ (A+36^@) , where 5A is an acute angle, find the va...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  15. Prove that: tan20^@tan35^@tan45^@tan55^@tan70^@=1

    Text Solution

    |

  16. Prove that: sin48^@sec42^@+cos48^@\ cos e c\ 42^@=2

    Text Solution

    |

  17. Prove that: (sin70^@)/(cos20^@)+(cos e c\ 20^@)/(sec70^@)-2cos70^@\ ...

    Text Solution

    |

  18. Prove that: (cos80^@)/(sin10^@)+cos59^@\ cosec\ 31^@=2

    Text Solution

    |

  19. If sintheta=cos(theta-45^@) , where theta and theta-45^@ are acute a...

    Text Solution

    |

  20. If A, B and C are interior angles of a triangle ABC, then show that "s...

    Text Solution

    |