The formulas of trigonometric functions of sec, csc and cot are secx= 1/(cosx), cscx= 1/(sinx), cotx =1/(tanx) = (cosx)/(sinx).

Sine function: sin θ = y/r

Cosine function: cos θ = x/r

Tangent function: tan θ = y/x

Cotangent function: cotθ = x/y

Secθ = r/x secθ = r/x

Cotangent function: CSC θ = r/y

The basic relationship between trigonometric functions with the same angle;

Square relation:

sin^2(α)+cos^2(α)= 1

tan^2(α)+ 1=sec^2(α)

cot^2(α)+ 1=csc^2(α)

Product relationship:

sinα=tanα*cosα

cosα=cotα*sinα

tanα=sinα*secα

cotα=cosα*cscα

secα=tanα*cscα

csα= secα* cotα

Reciprocal relationship:

tanα cotα= 1

sinα cscα= 1

cosα secα= 1