www.3112.net > (2009?卢湾区一模)在Rt△ABC中,∠ACB=90°,AB=5,sin∠CAB=45,D是斜边...

(2009?卢湾区一模)在Rt△ABC中,∠ACB=90°,AB=5,sin∠CAB=45,D是斜边...

(1)在△ABC中,∠ACB=90°,AB=5,sin∠CAB=45,∴BC=4,AC=3,(1分)

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