Ответ:
CB^2=AB^2-AC^2
CB^2=625-400
CB^2=225
CB=15
sinA=CB/AB
sinA=15/25
sinA=0,6
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Ответ:
CB^2=AB^2-AC^2
CB^2=625-400
CB^2=225
CB=15
sinA=CB/AB
sinA=15/25
sinA=0,6