tangent
tan
The trig function tangent,
written tan θ. tan θ equals .
For acute angles, tan θ can
be found by the SOHCAHTOA definition
as shown below on the left. The circle
definition, a generalization
of SOHCAHTOA, is shown
below on the right. f(x) = tan x is
a periodic function with period π.

See
also
Inverse tangent, angle
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