写出满足SinA<(1/2)的A的取值写出满足SinA<(1/2)的A的取值写出满足SinA<(1/2)的A的取值写出满足SinA<(1/2)的A的取值写出满足SinA<(1/2)的A的取值写出满足SinA<(1/2)的A的取值写出满足SinA<(1/2)的A的取值写出满足SinA<(1/2)的A的取值写出满足SinA<(1/2)的A的取值范围!看来高手不多啊,一楼的你也太绝了,想K你的!