Question

Number of solutions of 4cos-cosxl) = |x| is equal
to​

Answer 1

Answer:

y=4 ∣cosx∣ and y=2 sin∣x∣

∴2∣cosx∣=sin∣x∣

The total number of solutions for the given equation is equal to the number of points of intersection of curves y=2∣cosx∣ and y=sin∣x∣.

Clearly, the two curves intersect at four points. So, there are four solutions of the given equation.

Hence, option 'B' is correct.