Question 770554
Find all the radian solutions to 
cot(x)-2cos(x)cot(x)=0
cot(x)(1-2cos(x))=0
..
cot(x)=0
x=undefined
..
1-2cos(x)=0
2cos(x)=1
cos(x)=1/2
x=π/3+2πk, 5π/3+2πk, k=integer