问题标题:
tan()°=2.9888sin()°=0.3957cos()=0.7850sin()°=0.2sin()°=0.75精确到0.1
问题描述:

tan()°=2.9888sin()°=0.3957cos()=0.7850sin()°=0.2sin()°=0.75精确到0.1

侯洪涛回答:
  tan(71.5)°=2.9888sin(23.3)°=0.3957   cos(38.3)=0.7850sin(11.5)°=0.2   sin(48.6)°=0.75
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《tan()°=2.9888sin()°=0.3957cos()=0.7850sin()°=0.2sin()°=0.75精确到0.1|小学数学问答-字典翻译问答网》
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