Trigonometry

Digital I/O
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Trigonometry
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Utility

This library provides trigonometry functions, carrying out sin, cos and tan calculations.

sin

Description

Calculates the sine (sin) 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 (cos) 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 (tan) of an angle (in radians).

Syntax

tan(rad)

Parameters

rad: The angle in radians (float)

Returns

The tangent of the angle (double)

#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
    }
  
}