Sweeps In calculus a surface of revol ution is generated by rotming a curve )' = [(x) defined on an interval fa. hJ around an axis of revolution. For example. y = x 2 on [0. 1 J rotated about the _I-axis generates the surface shown in Figure 6.13. We say that the surface is "swept out" hy the curve rotating about the x-axis. -I (Jo ---",;--_.J'

L3 - 5 π π π Know the exact values of the trig functions for 0, , , , π 6 4 3 and π and use them to ﬁnd other angle values. 2 5π ex. Use a reference angle to ﬁnd sec . 4 √ ex. Solve for θ in [0,2π)f iot θ = − 3. What if the domain of θ is not restricted