在RT三角形ABC中,∠C=90°,a=4,b=25,则∠A是多少
在RT三角形ABC中,∠C=90°,BC=a=4,AC=b=25,则∠A是多少
人气:464 ℃ 时间:2019-09-17 13:25:02
解答
tana=a/b=4/25=0.16
a=9.09°0.16怎么算到a=9。09度啊 不会算 我就算到0.16用计算器或者就查反三角函数表
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