Posted by Anonymous on Saturday, September 5, 2009 at 5:52pm.
Find the general solution algebraically.
2 cos^2x=7cosx3

MATH (Problem Solving)  bobpursley, Saturday, September 5, 2009 at 6:08pm
could it be
2 cos^27cos +3=0
(2cosx 1)(cosx3)=0