Math.cos()

Math.cos() returns the trigonometric cos value of an angle in radian.
Syntax
Math.cos(angle_in_radian)
Note that all input numbers are in Radians.

Here are some examples.
System.out.println(Math.cos(Math.PI));	//-1
System.out.println(Math.cos(Math.PI/2));//6.123233995736766E-17
System.out.println(Math.cos(2)); 	//-0.4161468365471424
System.out.println(Math.cos(1.22));	//0.34364574631604705
System.out.println(Math.cos(-1.22)); 	//0.34364574631604705
System.out.println(Math.cos(0)); 	// 1.0
We can use toRadians to convert degree value to radian.
Math.round() to rounds a floot or double data type to nearest integer value
System.out.println(Math.round((Math.cos(Math.toRadians(180)))));//-1
System.out.println((Math.cos(Math.toRadians(180))));//-1.0
System.out.println(Math.cos(Math.toRadians(90)));//6.123233995736766E-17
System.out.println(Math.cos(Math.PI)); 	//-1.0
System.out.println(Math.cos(Math.PI/2));//6.123233995736766E-17


All Math functions


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