742 20a07 A152 548 Solutiona765b895c1594 by law of cosines c

Solution

a=765,b=895,c=1594

by law of cosines

cosA=[b²+c²-a²]/(2bc)

cosA=[895²+1594²-765²]/(2*895*1594)

cosA=0.966

A=14.95^o

cosB=[a²+c²-b²]/(2ac)

coB=[765²+1594²-895²]/(2*765*1594)

cosB=0.9533

B=17.57^o

cosC=[a²+b²-c²]/(2ab)

cosC=[765²+895²-1594²]/(2*765*895)

cosC=-0.843

C=147.47^o