求极限lim_{x->0} tan3x/sin5x = ( )A.0求极限lim_{x->0} tan3x/sin5x = ( )A.0B.3C.3/5D.5/3

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求极限lim_{x->0} tan3x/sin5x = ( )A.0求极限lim_{x->0} tan3x/sin5x = ( )A.0B.3C.3/5D.5/3
求极限lim_{x->0} tan3x/sin5x = ( )A.0
求极限lim_{x->0} tan3x/sin5x = ( )
A.0
B.3
C.3/5
D.5/3

求极限lim_{x->0} tan3x/sin5x = ( )A.0求极限lim_{x->0} tan3x/sin5x = ( )A.0B.3C.3/5D.5/3
C

=x→0时 sin3x/sin5x=3x/5x=3/5

lim_{x->0} tan3x/sin5x
=lim_{x->0} sin3x/sin5x *1/cos3x
=lim_{x->0} 3x/5x*1
=3/5
C

c
[tan3x/3x]*[5x/sin5x]*[3/5]