Question: How can I get all root of polar equation??


Please answer my question about my math lab class.

when I solve the equation about "     cos(2*theta)=1/2       "   by   " solve(cos(2*theta)=1/2,theta);"

I just get the answer "Pi/6" only

but I want the all root within "0 to 2*Pi"

How can I get the all root by limitting area of root??

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