How many solutions exist for the equation 3Cos 2x=-3 in the interval 0<=x<=2Pi The 2 confuses me. How do I adjust for that? Thanks

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- Oct 23rd 2008, 03:52 PMIDontunderstandTrig equations
How many solutions exist for the equation 3Cos 2x=-3 in the interval 0<=x<=2Pi The 2 confuses me. How do I adjust for that? Thanks

- Oct 23rd 2008, 04:14 PMskeeter

since , then