Both are double
.
Recall that single precision float has accuracy about the same as seven decimal places,
and that double precision float has accuracy about the same as 16 decimal places.
Here is some of the documentation:
java.lang Class Math ... cos public static double cos(double a) Returns the trigonometric cosine of an angle.
cos
is a static function of the class Math
,
which is found in the java.lang
package.
Classes from that package (such as String
and Math
)
are so common that you do not have to import the package.
The angle a
is a double
and must be expressed in radians.
The return value is a double
.
(Math Review: ) Can angles in radian measure be converted to degrees?