inverse tangent of negative 1

---restore content starts---Expressway coordinate elevation calculation software descriptionThe highway coordinate elevation calculation software is a very effective procedure which is summed up in many years of construction lofting work. It is a

Tricks efficient BP (inverse propagation algorithm) in neural network trainingTricks efficient BP(inverse propagation algorithm) in neural network training[Email protected]Http://blog.csdn.net/zouxy09tricks! It's a word that's filled with mystery

We are usually in the mathematical calculation is, often use trigonometric and inverse trigonometric functions, the most commonly used inverse trigonometric functions is probably atan, because this is equivalent to a given two points between the

Link It looks like this is called resolution ry. How to obtain the X coordinate between the intersection of the tangent from the light source to the Circle and the floor can be calculated by angle and distance ,, Angle A, B, and r can be obtained

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

 AbsABS (number): Returns the absolute value of the specified digit. An absolute value is a numeric value that has no sign.Number: Any real number that requires an absolute value.Example:ABS (-1.5) equals 1.5.ABS (0) equals 0.ABS (2.5) equals

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

This paper summarizes and analyzes the PHP mathematical operation function. Share to everyone for your reference, specific as follows: First, the commonly used function description: Abs: Get absolute value. Acos: Gets the inverse cosine value.

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.),

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