JavaScript Math cos() Method
The Javascript Math.cos() method is used to return the cosine of a number. The Math.cos() method returns a numeric value between -1 and 1, which represents the cosine of the angle given in radians. The cos() is a static method of Math, therefore, it is always used as Math.cos(), rather than as a method of a Math object created.
Syntax:
Math.cos(value)Parameters:
This function accepts a single parameter as mentioned above and described below:
- Value: This parameter is a number given in radians.
Return Value:
- The Math.cos() function returns the cosine of the given numbers which range from -1 to 1.
Example: This example returns the cosine of 0.
console.log("The cos of 0 : " + Math.cos(0));
Output
The cos of 0 : 1
Example 2: This example returns the cosine of 010.
console.log("Result : " + Math.cos(010));
Output
Result : -0.14550003380861354
Example 3: When 1 is passed as a parameter.
console.log("Result : " + Math.cos(1));
Output
Result : 0.5403023058681398
Example 4: When PI is passed as a parameter.
console.log("Result : " + Math.cos(Math.PI));
Output
Result : -1
Example 5: When Input is in degrees (not in radians)
const degree = 90;
console.log(
"cos(" + degree + ") = " + Math.cos((Math.PI * degree) / 180));
Output
cos(90) = 6.123233995736766e-17
Supported Browsers:
- Chrome 51
- Edge 15
- Firefox 54
- Safari 10
- Opera 38
JavaScript Math cos() Method – FAQs
What does the Math.cos() method do in JavaScript?
The
Math.cos()method returns the cosine of a number, where the number is given in radians.
How do you convert degrees to radians for use with Math.cos()?
To convert degrees to radians, multiply the degree value by
Math.PI / 180.
Can Math.cos() handle special numeric values like NaN, Infinity, and -Infinity?
Math.cos(NaN)returnsNaN.Math.cos(Infinity)andMath.cos(-Infinity)returnNaN.
How does Math.cos() relate to the unit circle?
The
Math.cos()method computes the x-coordinate of the point on the unit circle corresponding to the given angle in radians.
What are common use cases for the Math.cos() method?
- Trigonometric Calculations: Using
Math.cos()in mathematical and physics calculations involving angles.- Waveform Generation: Generating cosine waves for audio processing, signal processing, and simulations.
- Graphics and Animations: Calculating positions and movements in computer graphics and animations.
We have a complete list of Javascript Math Objects methods, to check those please go through this Javascript Math Object Complete reference article.
