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In computing and mathematics, the function atan2 is the 2- argument arctangent. By definition, is the angle measure (in radians, with ) between the positive -axis and the ray from the origin to the point in the Cartesian plane. Equivalently, is the argument (also called phase or angle) of the complex number.

Specifically, they are the inverses of the sine, cosine, tangent, cotangent, secant, and cosecant functions, [10] and are used to obtain an angle from any of the angle's trigonometric ratios. Inverse trigonometric functions are widely used in engineering, navigation, physics, and geometry .

Atan may refer to: Places. Atan, Armenia; Atan, Iran; People. Atan Shansonga (born 1955), Zambian diplomat; Çağdaş Atan, Turkish footballer; Cem Atan, Turkish footballer; Other. Attan, a Pashtun and Afghan traditional dance; arctangent, a trigonometric function atan2, the two-argument function implementing the arctangent in many computer ...

atan stands for "arc tangent." It is the inverse function of tangent - this means it undoes the tangent function. So atan(tan(30)) = 30.

Athan is a Greek male given name, which means "eternal life" or "immortal" or "rising sun". [1] . It can be a variant of Athanasios, and is of rising popularity among younger Greek parents. [2] . The name Athan may refer to: People. Athan Catjakis (1931-2022), American politician. Athan Iannucci (born 1982), Canadian lacrosse player.

v. t. e. Aten also Aton, Atonu, or Itn ( Ancient Egyptian: jtn, reconstructed [ˈjaːtin]) was the focus of Atenism, the religious system formally established in ancient Egypt by the late Eighteenth Dynasty pharaoh Akhenaten. Exact dating for the 18th dynasty is contested, though a general date range places the dynasty in the years 1550 to 1292 ...

Arctan Formula. As discussed above, the basic formula for the arctan is given by, arctan (Perpendicular/Base) = θ, where θ is the angle between the hypotenuse and the base of a right-angled triangle. We use this formula for arctan to find the value of angle θ in terms of degrees or radians.

Summary. The ATAN2 function is used to calculate the arctangent of a point in radians, which is the angle from the x-axis to a line connecting the origin (0, 0) to the point (x_num, y_num). The result is a value between -pi and pi.

atan is a function in math.h. [1] It computes arc tangent. It returns the principal value of the arc tangent of x, expressed in radians. In trigonometrics, arc tangent is the inverse operation of tangent. Note that because of sign ambiguity, function cannot determine in which quadrant the angle falls only by its tangent value.

Home. Calculators. Trignometry Calculators. Arc Tangent (atan) Calculator. Enter value. Result. Radians : Degrees : 0. Calculated atan () of the number. Calculate atan () 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.