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<head><title>acosh -- inverse hyperbolic cosine</title>
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<div><h1>acosh -- inverse hyperbolic cosine</h1>
<div class="single"><h2>Synopsis</h2>
<ul><li><div class="list"><dl class="element"><dt class="heading">Usage: </dt><dd class="value"><div><tt>acosh x</tt></div>
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<li><div class="single">Inputs:<ul><li><span><tt>x</tt></span></li>
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<li><div class="single">Outputs:<ul><li><span><span>a <a href="___Number.html">number</a></span>, the inverse hyperbolic cosine of <tt>x</tt></span></li>
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<div class="single"><h2>Description</h2>
<div><table class="examples"><tr><td><pre>i1 : acosh .2
o1 = 1.36943840600457*ii
o1 : CC (of precision 53)</pre>
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<tr><td><pre>i2 : cosh oo
o2 = .2
o2 : CC (of precision 53)</pre>
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<p>See <a href="http://en.wikipedia.org/wiki/Hyperbolic_function">http://en.wikipedia.org/wiki/Hyperbolic_function</a>.</p>
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<div class="waystouse"><h2>Ways to use <tt>acosh</tt> :</h2>
<ul><li>acosh(Number)</li>
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