Solve cos(2x)=-sqrt3/2

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Solve the trig equation with a double angle argument. Involves substitution.
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bro explained it simpler than the fcking college text book! Appreciate it!

JuanRamirez-xwgc
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I'm about to choke on my precalc test, wish me luck :(

worldsavior
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Thank you so much! I'm trying to do my homework and this just saved my life because I had no idea how to get the last two answers.

christiancav
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do you always add 12pi even if it positive problem?

summermixon