Grade 12Differential Calculus
(lim xtends to zero) 1-cos(2*x)*sqrt(cos(4*x))/x^2
3 Answers
pvn s
aaah, Use Lopital rule( differentiate numerator and denom twice)
Before that, simplify using ( cos2@-1)/2=COS^2@
rahul agrwl
ans is 2......just write 1 - cos 2x as 2 sin ^2 x ....and go ahead as limit x > 0 sin x / x =0
mohit yadav
1
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