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Starting from this chapter, we will learn about triangle learning and apply it to animation technology in chapter 5.It will be exposed during the graphic technique. If you already know about triangle learning or want to learn about animation, you

CoreGraphics.hCgaffinetransform rotation = cgaffinetransformmakerotation (m_pi_2);? [xxx settransform:rotation];? Oh just so simple two lines of code can be realized!By the way to record some constants, later use!#define M_e 2.718281828459045

CoreGraphics.hCgaffinetransform rotation = cgaffinetransformmakerotation (m_pi_2);? [xxx settransform:rotation];? Oh just so simple two lines of code can be realized!By the way to record some constants, later use!#define M_e 2.718281828459045

CoreGraphics.hCgaffinetransform rotation = cgaffinetransformmakerotation (m_pi_2);? [XXX settransform:rotation];Record some constants and use them later!#define M_e 2.71828182845904523536028747135266250 e? #define m_log2e 1.44269504088

1. Function callIn programming, a function is a name combination of a series of statements used for a certain calculation. When defining a function, you must specify the function name and write a series of program statements. Then, you can use the

In mathematics and physics, radians are the measurement units of angles. It is an international unit, abbreviated as rad.
Definition 1:The arc with the arc length equal to the radius, and its right center angle is 1 radian. (That is, the two rays

A, tan function syntax
function function: Returns the tangent value of the given angle.
Grammar
TAN (number)
Parameter introduction
Number is the angle of the tangent, expressed in radians.
Note: If the unit of the parameter is degrees, you

Examples of common PHP mathematical functions and BC high-precision mathematical functions, high-precision mathematical functions
This article provides examples of common PHP mathematical functions and BC high-precision mathematical functions. We

MySQL functions and Usage examples
String functions
ASCII (str)Returns the ASCII value of the first character of the string 'str' (0 is returned when 'str' is an empty string)Mysql> select ASCII ('2 ');-> 50Mysql> select ASCII (2 );-> 50Mysql>

This article is a small series of daily collection and collation of some JS classic examples, hereby share to the cloud Habitat Community Platform for your reference!
Adding events across browsers
Cross-browser Add event
function addevent

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