Home
Class 11
MATHS
cosx+cos^(2) x = 1 rArr sin^(8) x + 2sin...

`cosx+cos^(2) x = 1 rArr sin^(8) x + 2sin^(6) x+sin^(4) x = `

A

0

B

1

C

2

D

-1

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • TRIGONOMETRIC RATIOS

    AAKASH SERIES|Exercise PRATICE SHEET (EXERCISE) (LEVEL-II(ADVANCED) (SINGLE ANSWER TYPE QUESTIONS)|10 Videos

  • TRIGONOMETRIC RATIOS

    AAKASH SERIES|Exercise PRATICE SHEET (EXERCISE) (LEVEL-II(ADVANCED) (MORE THAN ONE CORRECT ANSWER TYPE QUESTIONS)|5 Videos

  • TRIGONOMETRIC RATIOS

    AAKASH SERIES|Exercise LECTURE SHEET (EXERCISE) (LEVEL - II (ADVANCED) (MORE THAN ONE CORRECT ANSWER TYPE QUESTIONS)|9 Videos

  • TRIGONOMETRIC EQUATIONS

    AAKASH SERIES|Exercise Practice Exercise|49 Videos

  • VECTOR (CROSS) PRODUCT OF TWO VECTORS

    AAKASH SERIES|Exercise Practice Exercise|34 Videos

Similar Questions

Explore conceptually related problems

sinx + sin^(2) x = 1 rArr cos^(2) x + cos^(4) x=

sin x + sin^(2) x + sin^(3) x = 1 rArr cos^(6) x - 4cos^(4) x + cos^(2) x =

If cos x + cos^(2) x =1 , " then " sin^(12) x + 3 sin^(10)x + 3sin^(8) x + sin^(6) x =

If sin x + sin^(2) x =1 " then " cos^(8) x + 2 cos^(6) x + cos^(4) x =

If y= ( sin^(4) x - cos^(4) x + sin^(2) x cos^(2) x )/( sin^(4) x + cos^(4) x + sin^(2) x cos^(2) x) , x in ( 0, (pi)/(2) ) , then

cos ^(2) 2x -cos ^(2) 6x = sin 4x sin 8x

sin ^(2) 6x - sin ^(2) 4x = sin 2x sin 10x

The least positive value of x satisfying (sin^(2) 2 x + 4 sin^(4) x - 4 sin^(2) x cos ^(2) x)/(4 - sin ^(2) 2 x - 4 sin^(2) x)= (1)/(9) is

2(sin^(6) x + cos^(6) x ) -3(sin^(4) x + cos^(4) x ) +1=

AAKASH SERIES-TRIGONOMETRIC RATIOS-PRATICE SHEET (EXERCISE) (LEVEL-I(MAIN) (SINGLE ANSWER TYPE QUESTIONS)
  1. cosecA + cot A=(2)/(3) rArr cos A=

    Text Solution

    |

  2. sinx + sin^(2) x = 1 rArr cos^(2) x + cos^(4) x=

    Text Solution

    |

  3. cosx+cos^(2) x = 1 rArr sin^(8) x + 2sin^(6) x+sin^(4) x =

    Text Solution

    |

  4. If sin x + cos x =a then |sin x - cos x|=

    Text Solution

    |

  5. If a sin^(2) theta+bcos^(2) theta = c, then tan^(2) theta =

    Text Solution

    |

  6. (1+sinA)(1+sinB)(1+sinC) = (1-sinA)(1-sinB)(1-sinC) = k rArr k=

    Text Solution

    |

  7. If (sin alpha + "cosec" alpha )^(2) + ( cos alpha + sec alpha )^(2)=k+...

    Text Solution

    |

  8. If 1+sin x + sin^(2)x +….oo = 4 + 2sqrt(3), 0 lt x lt pi, x ne pi//2 t...

    Text Solution

    |

  9. If asec theta + b tan theta = c then ( theta + bsec theta)^(2) =

    Text Solution

    |

  10. The value of cos""(pi)/(7)+cos""(2pi)/(7)cos""(3pi)/(7)+cos""(4pi)/(7...

    Text Solution

    |

  11. If piltalphalt(3pi)/(2) then sqrt((1-cosalpha)/(1+cosalpha))+sqrt((1+c...

    Text Solution

    |

  12. (1+tan alpha tan beta)^(2) + (tan alpha -tan beta)^(2) =

    Text Solution

    |

  13. cosec^(2)Acot^(2)A-sec^(2)Atan^(2)A-(cot^(2)A-tan^(2))(sec^(2)Acosec^(...

    Text Solution

    |

  14. ( cos^(3) A + sin^(3) A )/( cos A + sin A ) + (cos^(3) A - sin^(3)A)/(...

    Text Solution

    |

  15. If x = (2sintheta)/(1+costheta+sintheta), then (1-costheta+sintheta)/(...

    Text Solution

    |

  16. sin10^(@) + sin20^(@)+sin30^(@)+….+sin360^(@)=

    Text Solution

    |

  17. sin^(2)(51^(@)-x)+sin^(2)(39^(@)+x)=

    Text Solution

    |

  18. cos^(2)(125^(@)-x)-cos^(2)(55^(@)+x)=

    Text Solution

    |

  19. sin^(2)""(pi)/(18)+sin^(2)""(2pi)/(18)+sin^(2)""(4pi)/(18)+sin^(2)""(8...

    Text Solution

    |

  20. If alpha,beta are complementary angles and sin alpha = (3)/(5), then s...

    Text Solution

    |