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Description, This program calculates the atan2 function in either degrees or radians for both input and output. Author, Anthony C (anthonytc@email.com).

All the C functions, constants and header files have been explained in detail using very easy to understand examples. Description. The atan2 function is a variation of the atan function.For a given coordinates , is the angle between the positive X axis and the point .The angle is positive for counter-clockwise angles (where ), and negative for clockwise angles (where ).The result angle range is , and for both x and y are zeroes, .. Returned values are in radians, degrees or gradians, depending upon the system Atan2 Calculator. The arc tangent function with two arguments is called as the atan2. It can be represented as atan2(y,x).

C atan2 function

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_STD_END _GENERIC_MATH2(atan2, _CRTDEFAULT).

Function atan2() takes two arguments: x-coordinate and y-coordinate, and calculate the angle in radians for the quadrant. For better understanding of atan2(): [Mathematics] tan-1 (y/x) = atan2(y,x) [In C programming] Two other functions atan2f() and atan2l() are also present in C to specifically work with float and long double respectively.

error value. RETURN VALUES. The atan2() function returns the arc tangent of y/x, in the range [-pi, +pi] radians.. If both y and x are 0.0, the result is undefined.

The atan2() function returns a value in the range -π to π radians. If both arguments of the atan2() function are zero, the function sets errno to EDOM, and returns a value of 0. Example that uses atan() This example calculates arctangents using the atan() and atan2() functions.

__cdecl. atan2. (. double. function distance(lat1,lon1,lat2,lon2) {.

The Excel ATAN2 function calculates the arctangent (i.e.
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Compute the Trigonometric Arc Tangent of a Quotient. Portability: ISO/ ANSI C conforming, UNIX compatible This module provides access to the mathematical functions defined by the C For example, atan(1) and atan2(1, 1) are both pi/4 , but atan2(-1, -1) is -3*pi/4 . use radians as argument. We have explored all Trigonometric Functions using in C. atan2(), computes arc tangent, using signs to.

Function whose return I doubt any Python code you write [to calculate atan2] will be faster than the C library (math module) math functions.
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C++ Math atan2() The function finds the inverse tangent of a coordinate. Suppose the coordinate is (x,y):

Returns the principal value of the arc tangent of y/x, expressed in radians.