Cos B = BH/AB
BH^2=AB^2-AH^2
BH=√(52^2-(13√2)^2)=√(2704-338)=√2366=√(169*14)=13√14
Cos B = 13√14 / 52 = √14 / 4
Ответ √14 / 4
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Verified answer
Cos B = BH/AB
BH^2=AB^2-AH^2
BH=√(52^2-(13√2)^2)=√(2704-338)=√2366=√(169*14)=13√14
Cos B = 13√14 / 52 = √14 / 4
Ответ √14 / 4