Arc Tangent(atan) Calculator

Arc Tangent(atan) Calculator

Calculated atan() of the number

atan() function

Arc Tangent(atan) is the inverse function of Tangent (tan), which means that a==tan(atan(a)) for every value of 'a' that is within atan()'s range.

This is an online free atan calculator. You can calculate value of atan() trignometric function easily using this tool.

Important Abbreviations to remember

  • SOH: Opposite / Hypotenuse (Sine)
  • CAH: Adjacent / Hypotenuse (Cosine)
  • TOA: Opposite / Adjacent (Tangent)

Understanding the Main Trigonometric Functions

In mathematics, the trigonometric functions (also called circular functions, angle functions or goniometric functions) are functions of an angle. They relate the angles of a triangle to the lengths of its sides. Degrees and Radians are units of measuring these angles. Degrees originated as an unit to measure how far constellations moved in a day (1 degree ~ 1 day of movement). Degrees measure angles by how far we tilted our heads(Observer's view point). Radians measure angles by distance traveled(Movers's view point).

Other related Trigonometry pages