Home
Class 12
MATHS
if y=cos^2theta+sec^2theta then...

if `y=cos^2theta+sec^2theta` then

A

`y=0`

B

`y le2`

C

`y ge-2`

D

`y ne2`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRIC RATIOS AND IDENTITIES

    OBJECTIVE RD SHARMA|Exercise Chapter Test|60 Videos

  • TRIGONOMETRIC RATIOS AND IDENTITIES

    OBJECTIVE RD SHARMA|Exercise Section II - Assertion Reason Type|13 Videos

  • TRIGONOMETRIC EQUATIONS AND INEQUATIONS

    OBJECTIVE RD SHARMA|Exercise Chapter Test|60 Videos

Similar Questions

Explore conceptually related problems

if y=cos^(2)theta+sec^(2)theta then

cos2 theta sec theta=1

If y=sec^2theta+cos^2theta,\ theta!=0, then- y=0 b. ylt=2 c. ygeq-2 d. y > 2.

If cos theta + sec theta = 2 then cos^(n)theta+ sec^(n)theta is equal to ___

If cos theta+sec theta=2 then cos^(n)theta+sec^(n)theta=2 .Find n=

(1-cos^2theta)sec^2 theta= tan^2 theta

If cos theta + sec theta =2 , then sec^(2)theta - sin^(2)theta=

If cos theta+sec theta=2 then the value of cos10 theta+sec11 theta is

Prove :cos ec^(2)theta+sec^(2)theta=cos ec^(2)theta sec^(2)theta

OBJECTIVE RD SHARMA-TRIGONOMETRIC RATIOS AND IDENTITIES-Exercise
  1. If t a n^2theta=2t a n^2varphi+1 , prove that cos2theta+s in^2varphi=0...

    Text Solution

    |

  2. If sin2theta=cos3theta where theta in (0,pi/2) , then sintheta is equa...

    Text Solution

    |

  3. if y=cos^2theta+sec^2theta then

    Text Solution

    |

  4. The value of sinpi/(14)sin(3pi)/(14)sin(5pi)/(14)sin(7pi)/(14)sin(9pi)...

    Text Solution

    |

  5. The value of sin(pi/14)sin((3pi)/14)sin((5pi)/14) is

    Text Solution

    |

  6. if sin(alpha+beta)=1 and sin(alpha-beta)=1/2 " "0lealpha,beta,lepi/2,t...

    Text Solution

    |

  7. If cos(theta-alpha) = a and cos(theta-beta) = b then the value of sin^...

    Text Solution

    |

  8. If K=sin(pi/(18))sin((5pi)/(18))sin((7pi)/(18)), then the numerical va...

    Text Solution

    |

  9. Find the value of log tan1^0logtan2^0logtan89^0

    Text Solution

    |

  10. If 1+sinx+sin^2x+sin^3x+oo is equal to 4+2sqrt(3),0<x<pi, then x is eq...

    Text Solution

    |

  11. If If x cosalpha+y sinalpha=2a, x cos beta+y sinbeta=2aand 2sin""(alph...

    Text Solution

    |

  12. If tan x =(2b)/ (a- c), y = acos^2 x + 2bsin x cos x + csin^2 x, z=as...

    Text Solution

    |

  13. If alpha+beta+gamma=2pi then

    Text Solution

    |

  14. If sintheta-costhetalt0, then theta lies between

    Text Solution

    |

  15. If 2 sin""A/2=sqrt(1+sinA)+sqrt(1-sinA,)then A/2 lies between,

    Text Solution

    |

  16. If 2cos""(A)/(2)=sqrt(1+sinA)+sqrt(1-sinA), thenA/2 iles between,

    Text Solution

    |

  17. Find the angle theta whose cosine is equal to its tangent.

    Text Solution

    |

  18. The value of cos((2pi)/(15))cos((4pi)/(15))cos((8pi)/(15))cos((14pi)/(...

    Text Solution

    |

  19. Find the value of : cos(pi/15)cos((2pi)/15)cos((3pi)/15)cos((4pi)/15)c...

    Text Solution

    |

  20. The value of tan 5 theta is

    Text Solution

    |