The study of triangles, with emphasis on calculations involving
the lengths of sides and the measures
of angles. Trigonometry is
also known as trig.
Trigonometry is based on the six functions sine, cosine,
tangent, cosecant, secant, and cotangent.
Trig also includes studies of the properties of these functions
Finally, trig involves the analysis of circles and periodic
trig identities, SOHCAHTOA, circle
trig definitions, unit
circle trig definitions, special
values of special angles, inverse
trigonometry, law of cosines,
law of sines