Hyperbolic Functions Part 2a
<p>Last time we had integrations of Hyperbolic functions.</p>
<p>Today we are solving more involving inverse functions.</p>
<p>1: Integral from 0 to pi/2 of sin x dx/(1 + cos² x)^(1/2)</p>
<p>Let w = sinh^(-1) y = ln( y + (y² + 1)^(1/2) )</p>
<p>dw/dy = 1 / ( 1 + y² )^(1/2)</p>
<p>Let y = — cos x</p>
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