What do I do when I have an equation such as cos(3x)=0.5 ? I can't use double angle identities so I was wondering if there are some identities that I am missing?

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- Mar 21st 2013, 03:35 PMPazeTrig equation
What do I do when I have an equation such as cos(3x)=0.5 ? I can't use double angle identities so I was wondering if there are some identities that I am missing?

- Mar 21st 2013, 03:59 PMProve ItRe: Trig equation