SOLUTION: Solve for x: 3 + cos 2x = 7/2; only include answers on [0,2 pie]

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


   

Question 1042545: Solve for x: 3 + cos 2x = 7/2; only include answers on [0,2 pie]
Found 2 solutions by ana@10, Alan3354:
Answer by ana@10(4) About Me  (Show Source):
You can put this solution on YOUR website!
3+cos2x=7/2
Cos2x=7/2-3
Cos2x=1/2
2x= cos–¹1/2
2x=π÷3 or 2x=5π÷3
x=π÷6 or x=5π÷6

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
No math problems with pie, unless it's a pie chart.
----
Use the Greek letter pi.