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47 lines
1.5 KiB
JavaScript
47 lines
1.5 KiB
JavaScript
// test cot
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var assert = require('assert'),
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math = require('../../../index.js'),
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approx = require('../../../tools/approx.js'),
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pi = math.pi,
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complex = math.complex,
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matrix = math.matrix,
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unit = math.unit,
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cot = math.cot;
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// number
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approx.equal(cot(0), Infinity);
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approx.equal(1 / cot(pi*1/4), 1);
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approx.equal(1 / cot(pi*1/8), 0.414213562373095);
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approx.equal(cot(pi*2/4), 0);
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approx.equal(1 / cot(pi*3/4), -1);
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approx.equal(1 / cot(pi*4/4), 0);
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approx.equal(1 / cot(pi*5/4), 1);
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approx.equal(cot(pi*6/4), 0);
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approx.equal(1 / cot(pi*7/4), -1);
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approx.equal(1 / cot(pi*8/4), 0);
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// complex
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var re = 0.00373971037633696;
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var im = 0.99675779656935837;
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approx.deepEqual(cot(complex('2+3i')), complex(-re, -im));
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approx.deepEqual(cot(complex('2-3i')), complex(-re, im));
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approx.deepEqual(cot(complex('-2+3i')), complex(re, -im));
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approx.deepEqual(cot(complex('-2-3i')), complex(re, im));
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approx.deepEqual(cot(complex('i')), complex(0, -1.313035285499331));
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approx.deepEqual(cot(complex('1')), complex(0.642092615934331, 0));
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approx.deepEqual(cot(complex('1+i')), complex(0.217621561854403, -0.868014142895925));
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// unit
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approx.equal(cot(unit('45deg')), 1);
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approx.equal(cot(unit('-45deg')), -1);
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assert.throws(function () {cot(unit('5 celsius'))});
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// string
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assert.throws(function () {cot('string')});
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// array, matrix, range
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var cot123 = [0.642092615934331, -0.457657554360286, -7.015252551434534];
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approx.deepEqual(cot([1,2,3]), cot123);
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approx.deepEqual(cot(math.range('1:4')), cot123);
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approx.deepEqual(cot(matrix([1,2,3])), matrix(cot123));
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