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Answer 1 · 2017-11-05T10:07:40

#121/360pi#

#60^o30^'=(60^o)+(30^')##-----(eq1)#

For sum operation, two units should be same.

Therefore,we have to convert either degree to minute or minute to degree.

#60^'=1^o#

#30^'=0.5^o#

Substitute above value in eq(1)

#60^o30^'=(60^o)+(0.5^o)=60.5^o#

we know that

#1^o=pi/180 rad#

#60.5^o=60.5 **pi/180 rad=121/360pi#