Home
Class 11
MATHS
If cos^(2) x - (c - 1) cosx + 2c ge 6 fo...

If `cos^(2) x - (c - 1) cosx + 2c ge 6` for every `x in R`, then the true set of values of c is

A

`[2, oo)`

B

`[4,oo)`

C

`(-oo,-2]`

D

`(-oo,-4]`

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) (MORE THAN ONE CORRECT ANSWER TYPE QUESTIONS)|5 Videos

  • TRIGONOMETRIC RATIOS

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE (LEVEL - II) (PRACTICE SHEET (ADVANCED) SIGNLE ANSWER TYPE QUESTIONS)|23 Videos

  • TRIGONOMETRIC RATIOS

    AAKASH SERIES|Exercise PRATICE SHEET (EXERCISE) (LEVEL-I(MAIN) (SINGLE ANSWER TYPE QUESTIONS)|47 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

If cos 4 x = a_(0) + a_(1) cos ^(2) x + a_(2) cos ^(4) x is true for all values of x in R . Then the value of 5 a_(0) + a_(1) + a_(2) is _____

If x^(2) +y^(2) -4x + 6y + c = 0 represents a circle with radius 6 then find the value of c.

If f: R to C is defined by f(x) =e^(2ix) AA x in R , then f is (where C denotes the set of all complex numbers)