 R; cosh; (T x); -->
<p></p>
<p><code>R</code> <strong><code>cosh</code></strong><code>(T x)</code><br>
hyperbolic cosine of x (in radians)</p>
<!-- R; sinh; (T x); -->
<p></p>
<p><code>R</code> <strong><code>sinh</code></strong><code>(T x)</code><br>
hyperbolic sine of x (in radians)</p>
<!-- R; tanh; (T x); -->
<p></p>
<p><code>R</code> <strong><code>tanh</code></strong><code>(T x)</code><br>
hyperbolic tangent of x (in radians)</p>
<!-- R; acosh; (T x); -->
<p></p>
<p><code>R</code> <strong><code>acosh</