What are the basic trigonometric ratios?

The six fundamental trigonometric ratios are:

Sine (sin θ) = Perpendicular / Hypotenuse
Sinθ = $\frac{p}{h}$
Cosine (cos θ) = Base / Hypotenuse
Cosθ = $\frac{b}{h}$
Tangent (tan θ) = Perpendicular / Base
Tanθ = $\frac{p}{b}$
Cosecant (cosec θ) = Hypotenuse / Perpendicular (Reciprocal of sine)
Cosecθ = $\frac{h}{p}$
Secant (sec θ) = Hypotenuse / Base (Reciprocal of cosine)
Secθ = $\frac{h}{b}$
Cotangent (cot θ) = Base / Perpendicular (Reciprocal of tangent)
Cotθ = $\frac{b}{p}$