Втреугольнике авс угол с равен 90 градусов, ав=30. ас= 3 корень 19. найдите синус а
Velievtim2000
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19.05.2019 01:50
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1)По теореме пифагора находим BC. ВС равно корень квадратный из 30^2- (3√19)^2=27. 2)sinA=BC/AB=27/30=9/10=0,9