Post a New Question

pre-cal

posted by on .

What are the steps for solving this?

Directions Use the quadratic formula to solve the equation in the interval [0,2PI). Then use a graphing utility to approximate the angle x.

4cos^2x-4cosx-1=0

thanks.

  • pre-cal - ,

    quadratic equation?

    cosx= (4+-sqrt(16+4))/8

    graph y=4cos^2 x - 4cosx + 1 and note where it crosses the y=0 axis.

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question