public class InverseTrigno {
    public static void main(String[] args) {
        double degrees = 30;
        double radians = Math.toRadians(degrees);
        double sin, cos, tan;
        sin=Math.sin(radians);
        cos=Math.cos(radians);
        tan=Math.tan(radians);
        System.out.format("Value of Sin%.0f " + "degrees is %.4f%n",
                degrees, sin);
        System.out.format("Value of Cos%.0f " + "degrees is %.4f%n",
                degrees, cos);
        System.out.format("Value of Tan%.0f " + "degrees is %.4f%n",
                degrees, tan);
        System.out.format("Inverse of Sin%.0f " + " is %.0f%n",
                degrees, Math.toDegrees(Math.asin(sin)));
        System.out.format("Inverse of Cos%.0f " + "is %.0f%n",
                degrees, Math.toDegrees(Math.acos(cos)));
        System.out.format("Inverse of tan%.0f " + "is %.0f%n",
                degrees,  Math.toDegrees(Math.atan(tan)));
    }

}

output:

Value of Sin30 degrees is 0.5000
Value of Cose30 degrees is 0.8660
Value of Tan30 degrees is 0.5774
Inverse of Sin30 is 30
Inverse of Cose30 is 30
Inverse of tan30 is 30

Description: The basic Trigonometric functions are sin, cos and tan. Inverse of these functions are called arc sine ,arc cos and arc tan.In Math library it is represented as asin(),acos(),atan().

         toRadians(angel)?It converts  an angle measured in degrees to an approximately equivalent
                           angle measured in radians.
         toDegrees(angel) ? it converts an angle measured in radians to an approximately equivalent angle measured in degrees.
         sin() : Returns the trigonometric sine of an angle.
         cos() : Returns the trigonometric cosine of an angle.
         tan() : Returns the trigonometric tangent of an angle.
         asin(): It returns the arc sine of the specified double value.
         acos(): It returns the arc cosine of the specified double value.
         atan(): It returns the arc tangent of the specified double value.