mirror of https://github.com/jkjoy/sunpeiwen.git
22 lines
580 B
JavaScript
22 lines
580 B
JavaScript
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var utils = require('../utils')
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, nodes = require('../nodes')
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, convert = require('./convert-angle');
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/**
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* Return the arctangent of the given `value`.
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*
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* @param {Double} trigValue
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* @param {Unit} output
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* @return {Unit}
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* @api public
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*/
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module.exports = function atan(trigValue, output) {
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var output = typeof output !== 'undefined' ? output : 'deg';
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var value = Math.atan(trigValue) ;
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var m = Math.pow(10, 9);
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var convertedValue = convert(value, output);
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convertedValue = Math.round(convertedValue * m) / m;
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return new nodes.Unit(convertedValue, output);
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};
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