Ответ:
7
Объяснение:
RT^2 = 3^2 + 8^2 - 2*3*8*cos(60)RT^2 = 9+64-48*1/2RT^2=73-24RT^2=49RT = 7
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Ответ:
7
Объяснение:
RT^2 = 3^2 + 8^2 - 2*3*8*cos(60)
RT^2 = 9+64-48*1/2
RT^2=73-24
RT^2=49
RT = 7