The Sine of angle B is called Sin (B).
The Cosine of angle B is called Cos (B).
The Tangent of angle B is called Tan (B).

Sine, Cosine, and Tangent are the basic Trigonometric Functions.

The Cosecant of angle B is called Csc (B).
The Secant of angle B is called Sec (B).
The Cotangent of angle B is called Cot (B).

Cosecant, Secant, and Cotangent are the reciprocals of the basic Trigonometric Functions.

Csc (B) = 1 / Sin (B).
Sec (B) = 1 / Cos (B).
Cot (B) = 1 / Tan (B).

Sin (B) and Csc (B) define the ratio between the opposite side and the hypotenuse.
Sin (B) = opp/hyp = b/c. Csc (B) = hyp/opp = c/b.

Cos (B) and Sec (B) define the ratio between the adjacent side and the hypotenuse.
Cos (B) = adj/hyp = a/c. Sec (B) = hyp/adj = c/a.

Tan (B) and Cot (B) define the ratio between the opposite side and the adjacent side.
Tan (B) = opp/adj = b/a. Cot (B) = adj/opp = a/b