inverse tan of 2

// Gaussian projection positive and Inverse Calculation///// Bandwidth of 6 degrees 54 years Beijing Coordinate System// Gaussian projection inverse returns the geocoordinate (including band number, unit: metres) from the latitude and longitude

  // Gaussian projection positive and Inverse Calculation // 6-degree bandwidth 54-year Beijing coordinate system // Gaussian projection by latitude and longitude (unit: dd) returns the geocoordinate (with a number, unit: metres) void gaussprojcal

The syntax of a atan function function function: Returns the inverse tangent value. The tangent value is equal to the number parameter value because it is an angle. The returned angle value is expressed in radians, and the range is-PI/2 to PI/2.

1. Coordinate system:Flash coordinate system and mathematical coordinate system: the X axis is the same, and the y axis is the opposite.[Mathematical coordinate system][Coordinate system in Flash]2. Conversion between Angle and Radian:(1) radians:

Name Abs Category Mathematical functions Prototype Abs (number) Parameters Must be selected. The number argument is a valid numeric expression of any type "Return value" Type of same number "Exception/Error" No Description Returns the absolute value

ABS () Seek absolute value ACOs () Seeking the inverse cosine ASIN () Ask for the inverse of the string Atan () Ask for anyway cut ATAN2 () To find the tangent, to

constants, operators, and functions Digital Gnuplot that numbers can be divided into integers, real numbers and complex numbers: Integer: Gnuplot is the same as the C language, with 4 byte stored integers. It can represent an integer between 2147483

PHP Math function Summary (classic worth collecting), PHP is worth collecting This paper summarizes and analyzes the mathematical operation function of PHP. Share to everyone for your reference, as follows: First, the common function

The ARC scale selector implemented by custom view is implemented during Android development with the following effect.Demo effectOne, measurement:First, in the Onmeasure method, the width, center, and radius of the current view are obtained by

1. Mathematical FunctionsMathematical functions are mainly used to deal with numerical data, the main mathematical functions are: absolute value function, trigonometric function (including sine function, tangent function, cotangent function, etc.),