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(lim xtends to zero) 1-cos(2*x)*sqrt(cos(4*x))/x^2

MADHAV DHRUV , 12 Years ago
Grade 12
anser 3 Answers
pvn s

Last Activity: 12 Years ago

aaah, Use Lopital rule( differentiate numerator and denom twice)

Before that, simplify using ( cos2@-1)/2=COS^2@

rahul agrwl

Last Activity: 12 Years ago

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

Last Activity: 11 Years ago

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