Inverse trig documentation.

build.gradle

@@ -16,6 +16,5 @@ dependencies {
     testCompile 'junit:junit:4.12'
 }
 
-// Define the main class for the application
 mainClassName = 'org.nwapw.abacus.Abacus'
 

src/main/java/org/nwapw/abacus/plugin/StandardPlugin.java

@@ -655,27 +655,40 @@ public class StandardPlugin extends Plugin {
                 "the power that e has to be brought to to be equal to the number.\n\n" +
                 "Example: ln(2.718) -> 1", DocumentationType.FUNCTION));
         registerDocumentation(new Documentation("sqrt", "Square Root", "Finds the square root " +
-                "of the number.", "A square root a of a number is defined such that a times a is equal " +
+                "of the number.", "A square root a of a number is defined as the non-negative a such that a times a is equal " +
                 "to that number.\n\n" +
                 "Example: sqrt(4) -> 2", DocumentationType.FUNCTION));
         registerDocumentation(new Documentation("sin", "Sine", "Computes the sine of the given angle, " +
-                "in radians.", "", DocumentationType.FUNCTION));
+                "in radians.", "Example: sin(pi/6) -> 0.5", DocumentationType.FUNCTION));
         registerDocumentation(new Documentation("cos", "Cosine", "Computes the cosine of the given angle, " +
-                "in radians.", "", DocumentationType.FUNCTION));
+                "in radians.", "Example: cos(pi/6) -> 0.866... (the exact result is sqrt(3)/2)", DocumentationType.FUNCTION));
         registerDocumentation(new Documentation("tan", "Tangent", "Computes the tangent of the given angle, " +
-                "in radians.", "", DocumentationType.FUNCTION));
+                "in radians.", "Example: tan(pi/6) -> 0.577... (the exact result is 1/sqrt(3))", DocumentationType.FUNCTION));
         registerDocumentation(new Documentation("sec", "Secant", "Computes the secant of the given angle, " +
-                "in radians.", "", DocumentationType.FUNCTION));
+                "in radians.", "Example: sec(pi/6) -> 1.154... (the exact result is 2/sqrt(3))", DocumentationType.FUNCTION));
         registerDocumentation(new Documentation("csc", "Cosecant", "Computes the cosecant of the given angle, " +
-                "in radians.", "", DocumentationType.FUNCTION));
+                "in radians.", "Example: csc(pi/6) -> 2", DocumentationType.FUNCTION));
         registerDocumentation(new Documentation("cot", "Cotangent", "Computes the cotangent of the given angle, " +
-                "in radians.", "", DocumentationType.FUNCTION));
+                "in radians.", "Example: cot(pi/6) -> 1.732... (the exact result is sqrt(3))", DocumentationType.FUNCTION));
         registerDocumentation(new Documentation("random_int", "Random Integer", "Generates a random integer [0, n].",
                 "Generates a pseudorandom number using the standard JVM random mechanism, keeping it less than or " +
                         "equal to the given number.\n\n" +
                         "Example: random_int(5) -> 4\n" +
                         "random_int(5) -> 3\n" +
                         "random_int(5) -> 3\n", DocumentationType.FUNCTION));
+        registerDocumentation(new Documentation("arcsin", "Arcsine", "Computes the arcsine of x. (The result is in radians.)",
+                "Example: arcsin(0.5) -> 0.523... (the exact result is pi/6)", DocumentationType.FUNCTION));
+        registerDocumentation(new Documentation("arccos", "Arccosine", "Computes the arccosine of x. (The result is in radians.)",
+                "Example: arccos(0.5) -> 1.047... (the exact result is pi/3)", DocumentationType.FUNCTION));
+        registerDocumentation(new Documentation("arctan", "Arctangent", "Computes the arctangent of x. (The result is in radians.)",
+                "Example: arctan(1) -> 0.785... (the exact result is pi/4)", DocumentationType.FUNCTION));
+        registerDocumentation(new Documentation("arcsec", "Arcsecant", "Computes the arcsecant of x. (The result is in radians.)",
+                "Example: arcsec(2) -> 1.047... (the exact result is pi/3)", DocumentationType.FUNCTION));
+        registerDocumentation(new Documentation("arccsc", "Arccosecant", "Computes the arcscosecant of x. (The result is in radians.)",
+                "Example: arccsc(2) -> 0.523... (the exact result is pi/6)", DocumentationType.FUNCTION));
+        registerDocumentation(new Documentation("arccot", "Arccotangent", "Computes the arccotangent of x. (The result is in radians," +
+                " in the range (0, pi).)",
+                "Example: arccot(0) -> 1.570... (the exact result is pi/2)", DocumentationType.FUNCTION));
     }
 
     @Override