What is sin, tan, and sec

Answer:The tangent of x is defined to be its sine divided by its cosine: ... The cotangent of x is defined to be the cosine of x divided by the sine of x: cot x = cos x sin x. The secant of x is 1 divided by the cosine of x: sec x = 1 cos x, and the cosecant of x is defined to be 1 divided by the sine of x: csc x = 1 sin x.

Step-by-step explanation: Mark me Brainliest

Those are functions on a calculator. Mostly used for Trigonometry.