• sin(-510°)等于 .试题及答案-填空题-云返教育

    • 试题详情

      sin(-510°)等于         

      试题解答


      -
      利用诱导公式可知sin(-510°)=sin(-510°+360°)进而根据sin150°的值求得答案.

      sin(-510°)=sin(-510°+360°)=sin(-150°)=-sin150°=-

      故答案为-

    MBTS ©2010-2016 edu.why8.cn