added more tests to test.js

test.js

@@ -11,8 +11,10 @@ const {
   compare,
   compare_positive,
   constants,
+  cosine_radians,
   count_decimal_digits,
   count_integer_digits,
+  cube,
   cube_root,
   divide,
   eulers_number,
@@ -50,6 +52,7 @@ const {
   round_last_decimal,
   simplify_fraction,
   sign,
+  sine_radians,
   softmax,
   sort,
   square,
@@ -61,6 +64,22 @@ const {
 
 // const nthroot = (radicand, root) => Math.pow(radicand, 1 / root);
 
+test("cosine_radians", ({ eq }) => {
+  eq(cosine_radians("0.4014257", { steps: 10 }).startsWith("0.9205048643767727"), true);
+  eq(cosine_radians("-0"), "0");
+  eq(cosine_radians("0"), "0");
+  eq(Number(cosine_radians("1", { max_decimal_digits: 200, steps: 10 })), 0.5403023058681398);
+  eq(round(cosine_radians((2 * Math.PI).toString()), 10), "1");
+});
+
+test("sine", ({ eq }) => {
+  eq(sine_radians("0.4014257", { steps: 10 }).startsWith("0.3907311027531584"), true);
+  eq(sine_radians("-0"), "0");
+  eq(sine_radians("0"), "0");
+  eq(sine_radians("1").startsWith("0.8414709848078965"), true);
+  eq(Number(sine_radians((Math.PI / 2).toString())), 1);
+});
+
 test("hypotenuse", ({ eq }) => {
   // some examples from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/hypot
   eq(hypotenuse(), "0");
@@ -163,6 +182,10 @@ test("softmax", ({ eq }) => {
   eq(softmax(actual, { max_decimal_digits: 8 }), expected);
 });
 
+test("root_integer_digits", ({ eq }) => {
+  eq(root_integer_digits("100", "2"), "2");
+});
+
 test("root", ({ eq }) => {
   eq(root("-9", "1"), "-9");
   eq(root("-0.25", "1"), "-0.25");
@@ -173,11 +196,29 @@ test("root", ({ eq }) => {
   eq(root("-343", "3"), "-7");
 });
 
+test("cube", ({ eq }) => {
+  eq(cube("8"), "512");
+  eq(cube("-343", { max_decimal_digits: 4 }), "-40353607");
+});
+
 test("cube_root", ({ eq }) => {
   eq(cube_root("8"), "2");
   eq(cube_root("-343", { max_decimal_digits: 4 }), "-7");
 });
 
+test("square", ({ eq }) => {
+  eq(square("-9i"), "81");
+  eq(square("-9"), "81");
+  eq(square("-2", { max_decimal_digits: 4 }), "4");
+  eq(square("-1"), "1");
+  eq(square("-0.25"), "0.0625");
+  eq(square("-0"), "0");
+  eq(square("0"), "0");
+  eq(square("1"), "1");
+  eq(square("4"), "16");
+  eq(square("9"), "81");
+});
+
 test("square_root", ({ eq }) => {
   eq(square_root("-9"), "3i");
   eq(square_root("-2", { max_decimal_digits: 4 }), "1.4142i");