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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Kanika goswami 1
check it.
Your f'(x) is wrong. It will be 2Cos2x-1=0. Please rewrite it.
oh sorry.... now you have an idea to solve it....
I have the idea before taking the doubt also, but why we look for at x=0, no value is coming when we do f'(x)=0
wait ....I try
check
now you are happy