double cos (double __x) // returns cosine of x

double sin (double __x) // returns sine of x double sqrt (double __x) // returns square root of x double tan (double __x) // returns tangent of x

double atan2 (double __y, double __x) // arc tangent of y/x

See also

double sqrt (double __x) // returns square root of x in radians

double modf (double __value, double *__iptr) // breaks the argument value into

double log10 (double __x) // logarithm of x to base 10.

double square (double __x) // square of x

double cos (double __x) // returns cosine of x in radians

• float

Arduino trig and exponential functions use the avr-libc library. The library includes a great number of useful mathematical functions for manipulating floating point numbers.

• double

• Float

• Float?

Arduino trig and exponential functions use the avr-libc library. The library includes a great number of useful mathematical functions, for manipulating floating point numbers.

Arduino trig and exponential functions use the avr-libc library. The library includes a great number of useful mathematical functions, for manipulating floating point numbers. This is why you graduated from the Basic Stamp.

double modf (double __value, double *__iptr) //breaks the argument value into

                                              // integral and fractional parts

Arduino trig and exponential functions use the avr-libc library. The library includes a great number of useful mathematical functions, including trigonometric, and logarithmic functions. This is why you graduated from the Basic Stamp.

The Atmega8 chip, which is now dated, but still supported, does not have enough memory to be able to use the math.h library so you will probably need to update to an Atmega168 if you wish to use any of these functions.

Includes a great number of useful mathematical functions, including trigonometric, and logarithmic functions. This is why you graduated from the Basic Stamp.

See

• Float?

11 See

• float?
• double?

double cos(double __x) // returns cosine of x in radians

double square (double __x) // square of x

double cos(double __x) // returns cosine of x in radians double fabs (double __x) // absolute value of a float

double sin (double __x) // returns sine of x in radians

double tan (double __x) // returns tangent of x in radians double exp (double __x) // function returns the exponential value of x. double atan (double __x) // arc tangent of x

double log (double __x) // natural logarithm of x

double fabs (double __x) // absolute value of a float

The Atmega8 chip, which is now dated, but still supported, does not have enough memory to be able use the math.h library so you will probably need to update to an Atmega168 if you wish to use any of these functions.

#include <math.h> // (no semicolon)

The AVR math library, which is included in your sketch by using the line {@#include <math.h> // (no semicolon)@]

double atan (double __x) // arc tangent of x double atan2 (double __y, // arc tangent of y/x

The Atmega8 chip, which is now dated, but still supported does not have enough memory to be able use the math.h library so you will probably need to update to an Atmega168 if you wish to use any of these functions.

Someone email a small example to pbadger@verizon.net and I'll put it in here

includes a great number of mathematical functions. This is why you graduated from the Basic Stamp.

List of more common functions with descriptions

This is just a partial list - check the docs for more obscure functions

double square (double __x) // square of x

@]

math.h

The AVR math library, which is included in your sketch by using the line #include <math.h> (no semicolon) includes a great number of mathematical functions.

The Atmega8 chip, which is now dated but still supported does not have enough memory to be able use the math.h library so you will probably need to update to an Atmega168 if you wish to use any of these functions.

The full docs for math.h may be found here

Example:

Someone email a little example to pbadger@verizon.net and I'll put it in here

List of functions and desciption

[@ double cos(double __x) // returns cosine of x in radians double fabs (double __x) //absolute value of a float double fmod (double __x, double __y) // floating point modulo double modf (double __value, double *__iptr) //breaks the argument value into integral and fractional parts double sin (double __x) // returns sine of x in radians double sqrt (double __x) returns square root of x in radians double tan (double __x) // returns tangent of x in radians double exp (double __x) // function returns the exponential value of x. double atan (double __x) __ATTR_CONST__ double atan2 (double __y, double __x) __ATTR_CONST__ double log (double __x) // natural logarithm of x double log10 (double __x) //logarithm of x to base 10. double pow (double __x, double __y) // x to power of y int isnan (double __x) // returns 1 if "not a number" int isinf (double __x) returns 1 if the argument x is positive or negative infinity double square (double __x) // square of x