Question

help!! limit as x approaches 0 of (sin x-x cos x)/tan^3 x

Answer 1

please tell me you can use l'hopital

Answer 2

Yeah...sure

Answer 3

then take the derivative top and bottom

Answer 4

Yeah...it still gives me 0/0

Answer 5

then do it again
simplify it first

Answer 6

the first time you should be looking at
\[\frac{\cos^3(x)}{3\tan(x)}\]

Answer 7

Thanks! got it...had to differentiate thrice

Answer 8

equals 1/3