angle
30°
sine
0.500
cosine
0.866
tangent
0.577
cotangent
1.732
secant
1.155
cosecant
2.000
angle
30°
sine
0.500
cosine
0.866
The six trig
values associated
with an angle appear
—with "1"— as (signed)
lengths of segments in the
Complete Triangle figure.
Properties of the 7 similar
right triangles provide many
relations among the values.
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Sin

Tan

Sec

Cos

Cot

Csc

Radians

Pieces of π