一、在△ABC中,∠C=90°(1)若已知a、∠A,则∠B=______,b=______,c=______.(1)若已知c、∠B,则∠A=______,a=______,b=______.(1)若已知b、∠A,则∠B=______,a=______,c=______.(1)若已知c、∠A,则∠B=______,a=______
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