lim (x→0+)tan x/x=

lim (x→0+)tan x/x=

When x goes to zero,
x. SiNx and TaNx are equivalent,
The limit value of the ratio between each other is 1,
Important limits
LIM (x tends to 0) SiNx / x = 1
You should know,
that
tanx=sinx /cosx
therefore
LIM (x tends to 0) TaNx / X
=LIM (x tends to 0) (SiNx / cosx) / X
=LIM (x tends to 0) SiNx / X * 1 / cosx into SiNx / X tends to 1 and cosx tends to 1
=1 * 1
=1