How can I prove the following equation: cos2(x)=12(1+cos(2x)), using Euler's identity? eiπ+1=0.
I have tried equating Euler's equation to cos on one side and squaring that but haven't had luck reducing it to the desired form as outlined in (1).
How can I prove the following equation: cos2(x)=12(1+cos(2x)), using Euler's identity? eiπ+1=0.
I have tried equating Euler's equation to cos on one side and squaring that but haven't had luck reducing it to the desired form as outlined in (1).
How to find lim without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...
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