Trigonometric Functions and Identities

Cos= Adjacent/Hypotenuse, graphed on the scale of 2pi, and it's inverse is Secant.

Sin= Opposite/Hypotenuse, graphed on the scale of 2pi, and it's inverse function is cosecant.

Tan= Opposite/Adjacent, graphed on the scale of pi, and it's inverse is Cotangent.

Cosecant= Hypotenuse/Opposite, graphed on the scale of pi, and it's inverse is sin.

Secant= Hypotenuse/Adjacent, groshed on the scale of 2pi, and it's inverse function is cosine.

Cotangent= Adjacent/Opposite, graphed on the scale of pi, and it's inverse function is tangent.

1/Sin=Cosecant

1/Cos=Secant

1/Tan=Cotanget

1/Cosecant=Sin

1/Secant=Cosine

1/Cotangent=Tangent

Sin/Cos=Tangent

1 + Sec^2= Tan