Home
Class 10
MATHS
9sec^2A-9tan^2A is equal to (a) 1 (b) 9 ...

`9sec^2A-9tan^2A` is equal to (a) 1 (b) 9 (c) 8 (d) 0

Promotional Banner

Topper's Solved these Questions

  • TRIANGLES

    RD SHARMA|Exercise All Questions|361 Videos

  • TRIGONOMETRIC RATIOS

    RD SHARMA|Exercise All Questions|249 Videos

Similar Questions

Explore conceptually related problems

Choose the correct option. Justify your choice. (i) 9sec^2A-9tan^2A= (a) 1 (b) 9 (c) 8 (d) 0

(A) 7 (B) 8 (C) 6 (D) 9

(-2)x\ (-9)-6\ x\ (-8) is equal to: (a) 156 (b) 60 (c) -156\ (d) -60

9 sec^(2) A - 9 tan^(2) A =

((1.49xx14.9-0.51xx5.1)/(14.9-5.1)) is equal to (a) 0.20 (b) 2.00( c) 20 (d) 22 is equal to

tan^(6)((pi)/(9))-33tan^(4)((pi)/(9))+27tan^(2)((pi)/(9)) is equal to (a)0 (b) sqrt(3)(c)3(d)9

If A=[(2,3),(5,-2)] then 9A^-1 is equal to (A) A\' (B) 2A (C) 1/2 A (D) A

If (1-tan^(2)36^(@))/(2)=sqrt(a)-sqrt(b) ,then the value of (a+b) is equal to (a,b in N) (A)5 (B) 9 (C) 7 (D)None of these

[{(-1/3)^2}^(-2)]^(-1) = (a) 1/(81) (b) 1/9 (c) -1/(81) (d) -1/9

If A= [[2,5],[1,-2]] then |A| is (a) -9 (b) 9 (c) 1 (d) -1

RD SHARMA-TRIGONOMETRIC IDENTITIES-All Questions
  1. The value of (1+cottheta-cos e c\ theta)(1+tantheta+sectheta) is (a...

    Text Solution

    |

  2. (tantheta)/(sectheta-1)+(tantheta)/(sectheta+1) is equal to 2tanthet...

    Text Solution

    |

  3. (cos e c\ theta-sintheta)(sectheta-costheta)(tantheta+cottheta) is equ...

    Text Solution

    |

  4. If x=acostheta and y=bsintheta , then b^2x^2+a^2y^2= (a)a^2b^2 (b) a ...

    Text Solution

    |

  5. If x=asectheta and y=btantheta , then b^2x^2-a^2y^2= (a)a b (b) ...

    Text Solution

    |

  6. (cottheta)/(cottheta-cot3theta) + tantheta/(tantheta-tan3theta) is equ...

    Text Solution

    |

  7. 2(sin^6theta+cos^6theta)-3(sin^4theta+cos^4theta) is equal to (a)0 (...

    Text Solution

    |

  8. If acostheta+bsintheta=4 and asintheta-bcostheta=3 , then a^2+b^2 = (a...

    Text Solution

    |

  9. If acottheta+b"c o s e c"theta=p and bcottheta+a"c o s e c"theta=q , t...

    Text Solution

    |

  10. The value of sin^2 29o+sin^2 61o is (a) 1 (b) 0 (c) 2sin^2 29o (d) ...

    Text Solution

    |

  11. If x=rsinthetacosvarphi , y=rsinthetasinvarphi and z=rcostheta , then ...

    Text Solution

    |

  12. If sintheta+sin^2theta=1 , then cos^2theta+cos^4theta= (a)-1 (b) 1 (c...

    Text Solution

    |

  13. If acostheta+bsintheta=m and asintheta-bcostheta=n , then a^2+b^2= (a...

    Text Solution

    |

  14. If cosA+cos^2A=1 , then sin^2A+sin^4A= (a)-1 (b) 0 (c) 1 (d) None of ...

    Text Solution

    |

  15. If x=asecthetacosvarphi , y=bsecthetasinvarphi and z=ctantheta , then ...

    Text Solution

    |

  16. If acostheta-bsintheta=c , then asintheta+bcostheta= (a)+-sqrt(a^2+b^...

    Text Solution

    |

  17. 9sec^2A-9tan^2A is equal to (a) 1 (b) 9 (c) 8 (d) 0

    Text Solution

    |

  18. (1+tanθ+secθ)( 1+cotθ−cosec θ )=   (a) 0               (b) 2        ...

    Text Solution

    |

  19. ( secA+tanA )( 1−sinA )= (a)secA (b) sinA (c) cosec A (d...

    Text Solution

    |

  20. (1+tan^2A)/(1+cot^2A) is equal to sec^2A (b) -1 (c) cot^2A (d) tan^2A

    Text Solution

    |