SOLUTION: Solve for x: 3 + cos 2x = 7/2; only include answers on [0, 2π]. Thank you!

Algebra ->  Trigonometry-basics -> SOLUTION: Solve for x: 3 + cos 2x = 7/2; only include answers on [0, 2π]. Thank you!      Log On


   

Question 955440: Solve for x: 3 + cos 2x = 7/2; only include answers on [0, 2π]. Thank you!
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
Solve for x: 3 + cos 2x = 7/2; only include answers on [0, 2π].
3+cos(2x)=7/2
6+2cos(2x)=7
2cos(2x)=1
cos(2x)=1/2
2x=π/6, 11π/6 (In quadrants I and IV where cos>0)
x=π/12, 11π/12