(1)在Rt△ABC中,∠C=90°,AB=4,BC=3,则sinA=_____,cosA=_____.
(1)在Rt△ABC中,∠C=90°,AB=4,BC=3,则sinA=_____,cosA=_____.
(1)在Rt△ABC中,∠C=90°,AB=4,BC=3,则sinA=_____,cosA=_____.
(2)在Rt△ABC中,∠C=90°,BC=2AC,则sinA=_____,sinB=_____,tanA=_____.
(3)在Rt△ABC中,∠C=90°,且CD⊥AB,CD=4,BD=3,则sinB=_____.