How do you solve the following equation over an unrestricted domain;
|cos(2x)|=12
I can solve half of it;
cos(2x)=12x=πn±π6
but how do you do the other half
cos(2x)=−12
How to find lim without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...
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