题目

A woman and a man were involved in a car accident on a snowy cold Monday morning. Both of their cars became totally damaged. But amazingly neither of them was hurt. God works in mysterious ways. After they got out of their cars, the woman said, “ So you’re a man. That’s interesting. I’m a woman. Wow, just look at our cars! There’s nothing left, but we’re unhurt. This must be a sign from God that we should meet and be friends and live together in peace for the rest of our days.” Flattered（受到了奉承）, the man replied, “ Oh yes, I agree with you completely. This must be （2013•崇明县一模）在Rt△ABC中，∠C=90°，已知a和A，则下列关系中正确的是（ ）A．c=asinA B．c= C．c=acosA D．c=