SOLUTION: Use the Quadratic Formula to solve the equation in the interval [0, 2π). Then use a graphing utility to approximate the angle x. (Enter your answers as a comma-separated list.
Algebra.Com
Question 856566: Use the Quadratic Formula to solve the equation in the interval [0, 2π). Then use a graphing utility to approximate the angle x. (Enter your answers as a comma-separated list. Round each answer to four decimal places.)
1. 4cosine^2 x - 4cosine x - 1=0
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
The unknown is
I could say:
Here's the graph:
Now I can zero in:
This is between and
It looks like
and the other zero crossing:
This is between and
It looks like
This is invalid since the
cosine can't exceed
----------------------
radians
check:
pretty close
Hope I got it
RELATED QUESTIONS
5sinx+2cosx=0 Use a graphing utility to approximate the solutions of the equation in the... (answered by Fombitz)
Use the Quadratic Formula to solve the equation in the interval [0, 2π). Then use a... (answered by lwsshak3)
Use the Quadratic Formula to solve the equation in the interval [0, 2π). Then use a... (answered by ikleyn)
Use the Quadratic Formula to solve the equation in the interval [0, 2π). Then use a... (answered by ikleyn)
Use the Quadratic Formula to solve the equation in the interval [0, 2π). Then use a... (answered by Alan3354)
Use the Quadratic Formula to solve the equation in the interval [0, 2𝜋). Then use a... (answered by MathLover1)
Use a graphing utility to approximate the solutions (to three decimal places) of the... (answered by Alan3354)
Use the Quadratic Formula to solve the equation in the interval [0, 2π). Then use a... (answered by Alan3354)
I have no idea how to start this problem. Ca you please help. Use a graphing utility to... (answered by Edwin McCravy)