Lnsinx
x→π/2
=Lnsinx/cotx)
x→π/2
=林·e^(-cosxsinx)
x→π/2
=e^(-cosπ/2sinπ/2 )
=e?
=1
(7)
lim (lnx-lna)/(x-a)
x→a
=lim(1/x -0)/(1-0)
x→a
=lim (1/x)
x →a
=1/a
Lnsinx
x→π/2
=Lnsinx/cotx)
x→π/2
=林·e^(-cosxsinx)
x→π/2
=e^(-cosπ/2sinπ/2 )
=e?
=1
(7)
lim (lnx-lna)/(x-a)
x→a
=lim(1/x -0)/(1-0)
x→a
=lim (1/x)
x →a
=1/a