We know that, #pi^R=180^circ#
#:.(3/4)^R =(3/4xx180/pi)^circ...towhere,pi=22/7#
#=>(3/4)^R=(3/4xx180xx7/22)^circ#
#color(white)(................)=(945/22)^circ#
#color(white)(................)=(42 21/22)^circ#
#color(white)(................)=42^circ+
(21/22xx60)^'to[As,1^circ=60^']#
#color(white)(................)=42^circ+(1260/22)^'#
#color(white)(................)=42^circ+(57 6/22)^'#
#color(white)(................)=42^circ+57^'+(6/22xx60)^('')to
[as1^'=60^('')]#
#color(white)(................)=42^circ+57^'+(360/22)^('')#
#color(white)(................)=42^circ+57^'+16^('')#
#color(white)(................)=42^circ57^'16^('')#