Answer
a). $30^{\circ}$
b). $75^{\circ}$
c). $135^{\circ}$
d). $180^{\circ}$
Work Step by Step
a). $\frac{pi}{6} rad=\frac{pi}{6}\times\frac{180^{\circ}}{pi}=30^{\circ}$
b). $\frac{5pi}{12} rad=\frac{5pi}{12}\times\frac{180^{\circ}}{pi}=75^{\circ}$
c). $\frac{3pi}{4} rad=\frac{3pi}{4}\times\frac{180^{\circ}}{pi}=135^{\circ}$
a). $pi \, rad=pi\times\frac{180^{\circ}}{pi}=180^{\circ}$