The six trigonometric functions are defined below. Refer to the above diagram to get the relational picture.

sinθ = \( \dfrac {\mathrm{perpendicular}} {\mathrm{hypotenuse}} = \dfrac {p}{h} \)

cosθ = \( \dfrac {\mathrm{base}} {\mathrm{hypotenuse}} = \dfrac {b}{h} \) 

tanθ = \( \dfrac {\mathrm{perpendicular}} {\mathrm{base}} = \dfrac {p}{b} \) 

cosecθ = \( \dfrac {\mathrm{hypotenuse}} {\mathrm{perpendicular}} = \dfrac {h}{p} \)

secθ = \( \dfrac {\mathrm{hypotenuse}} {\mathrm{base}} = \dfrac {h}{b} \)

cotθ = \( \dfrac {\mathrm{base}} {\mathrm{perpendicular}} = \dfrac {b}{p} \)