Parametric Formulas 3

<p>Last time we found Lengths and Centroids.</p> <p>Today we are finding Area of Surface of Revolution.</p> <p>Formula for Area of Surface :</p> <p>1: Revolution about x-axis ( y &gt;= 0 )</p> <p>Surface area= Int. from a to b of 2pi y((dx/dt)&sup2; + (dy/dt)&sup2;)^(1/2) dt (1)</p> <p>2: Revolution about y-axis ( x &gt;= 0 )</p> <p>Surface area= Int. from a to b of 2pi x((dx/dt)&sup2; + (dy/dt)&sup2;)^(1/2) dt (2)</p> <p><a href="https://medium.com/@ttc7212/parametric-formulas-3-edd9cdb782f2"><strong>Learn More</strong></a></p>