Find the distance between two cities law of cosine Solutionb

Find the distance between two cities, law of cosine*

by law of cosines

a²=b²+c²-2bccosA

a²=220²+240²-2*220*240*cos1.9^o

a²=48400+57600-105541.9428

a²=458.0572

a=21.4

distance between the two cities =21.4 km

Find the distance between two cities, law of cosine* Solutionby law of cosines a2=b2+c2-2bccosA a2=2202+2402-2*220*240*cos1.9o a2=48400+57600-105541.9428 a2=45

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