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a+b=10
a=10-b
(10-b) sin 45=b sin 60
(10-b) 0,707=b. 0,87
7,07-0,707 b= 0,87 b
7,07=1,57 b
b= 4,5
a= 10-4,5=5.5
5,5 × sin 75= c sin 60
5,31= c 0,87
c=6,1