Basic Library
Digital I/O
Analog I/O
Advanced I/O
Time
Math
Trigonometry
Random Numbers
Bits and Bytes
Interrupts
Serial Comm.
Standard Library
Ethernet
Ethernet (Server)
Ethernet (Client)
Servo Motor
Stepping Motor
Character LCD
EEPROM
SPI
I2C (Wire)
SD
SD (File Operations)
Image Processing
Periodic Operation
Clock (RTC)
Utility
Trigonometry
This library provides trigonometry functions, carrying out sin, cos and tan calculations.
sin
- Description
- Calculates the sine of an angle (in radians).
- Syntax
- sin(rad)
- Parameters
- rad: The angle in radians (float)
- Returns
- The sine of the angle (double)
cos
- Description
- Calculates the cosine of an angle (in radians).
- Syntax
- cos(rad)
- Parameters
- rad: The angle in radians (float)
- Returns
- The cosine of the angle (double)
tan
- Description
- Calculates the tangent of an angle (in radians).
- Syntax
- tan(rad)
- Parameters
- rad: The angle in radians (float)
- Returns
- The tangent of the angle (double)
Sample Program
#include <Arduino.h>
void setup(){
Serial.begin(9600);
}
void loop(){
// print labels
Serial.print("RAD"); // prints a label
Serial.print("\t"); // prints a tab
Serial.print("SIN");
Serial.print("\t");
Serial.print("COS");
Serial.print("\t");
Serial.print("TAN");
Serial.print("\t");
Serial.println("");
for(float x=0; x< PI; x+=0.01){ // only part of the ASCII chart, change to suit
// print it out in many formats:
Serial.print(x); // print as an ASCII-encoded decimal - same as "DEC"
Serial.print("\t"); // prints a tab
Serial.print(sin(x)); // print as an ASCII-encoded decimal
Serial.print("\t"); // prints a tab
Serial.print(cos(x)); // print as an ASCII-encoded hexadecimal
Serial.print("\t"); // prints a tab
Serial.print(tan(x)); // print as an ASCII-encoded octal
Serial.print("\t"); // prints a tab
Serial.println(""); // prints another carriage return
delay(100); // delay 100 milliseconds
}
}