mirror of
https://github.com/josdejong/mathjs.git
synced 2026-01-18 14:59:29 +00:00
48 lines
1.7 KiB
JavaScript
48 lines
1.7 KiB
JavaScript
// test sin
|
|
var assert = require('assert'),
|
|
math = require('../../../math.js'),
|
|
approx = require('../../../tools/approx.js'),
|
|
pi = math.pi,
|
|
complex = math.complex,
|
|
matrix = math.matrix,
|
|
unit = math.unit,
|
|
sin = math.sin;
|
|
|
|
// TODO: replace all string comparisons with approx.equal comparisons with numbers
|
|
|
|
// number
|
|
approx.equal(sin(0), 0);
|
|
approx.equal(sin(pi*1/4), 0.707106781186548);
|
|
approx.equal(sin(pi*1/8), 0.382683432365090);
|
|
approx.equal(sin(pi*2/4), 1);
|
|
approx.equal(sin(pi*3/4), 0.707106781186548);
|
|
approx.equal(sin(pi*4/4), 0);
|
|
approx.equal(sin(pi*5/4), -0.707106781186548);
|
|
approx.equal(sin(pi*6/4), -1);
|
|
approx.equal(sin(pi*7/4), -0.707106781186548);
|
|
approx.equal(sin(pi*8/4), 0);
|
|
approx.equal(sin(pi/4), math.sqrt(2)/2);
|
|
|
|
// complex
|
|
assert.deepEqual(sin(complex('2+3i')).toString(), '9.1545 - 4.1689i');
|
|
assert.deepEqual(sin(complex('2-3i')).toString(), '9.1545 + 4.1689i');
|
|
assert.deepEqual(sin(complex('-2+3i')).toString(), '-9.1545 - 4.1689i');
|
|
assert.deepEqual(sin(complex('-2-3i')).toString(), '-9.1545 + 4.1689i');
|
|
assert.deepEqual(sin(complex('i')).toString(), '1.1752i');
|
|
assert.deepEqual(sin(complex('1')).toString(), '0.84147');
|
|
assert.deepEqual(sin(complex('1+i')).toString(), '1.2985 + 0.63496i');
|
|
|
|
// unit
|
|
approx.equal(sin(unit('45deg')), 0.707106781186548);
|
|
approx.equal(sin(unit('-45deg')), -0.707106781186548);
|
|
assert.throws(function () {sin(unit('5 celsius'))});
|
|
|
|
// string
|
|
assert.throws(function () {sin('string')});
|
|
|
|
// array, matrix, range
|
|
var sin123 = [0.84147098480789, 0.909297426825682, 0.141120008059867];
|
|
approx.deepEqual(sin([1,2,3]), sin123);
|
|
approx.deepEqual(sin(math.range('1:3')), sin123);
|
|
approx.deepEqual(sin(matrix([1,2,3])), matrix(sin123));
|