Tentukan hasil dari:a.57° 16′ 31″ + 10° 56′ 45″ b.87° 4′ 28″ – 35° 25′ 16″

A. 57°16'31" + 10°56'45"
= 67°72'76"
= 67°73'16"
= 68°13'16"
b. 87°4'28" – 35°25'16"
= 86°64'28" – 35°25'16"
= 51°39'12"