Q14 of 142 Page 11

Mark the Correct alternative in the following:

The number of values of x in [0, 2π] that satisfy the equation


1-cos2x-cos x-0.25=0



Solving the quadratic equation, we get


Cos x = 0.5


So x= 60° or 300°


Hence there are 2 values


Option B

More from this chapter

All 142 →
12

Mark the Correct alternative in the following:

A value of x satisfying is


 13

Mark the Correct alternative in the following:

In (0, π), the number of solutions of the equation tan x + tan 2x + tan 3x = tan x tan 2x tan 3x is


 15

Mark the Correct alternative in the following:

If esin x – e– sin x – 4 = 0, then x =


 16

Mark the Correct alternative in the following:

The equation 3 cos x + 4 sin x = 6 has …. Solution