tanA=5\7,tanB=7/5问角A=?角B=?精确到1"
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tanA=5\7,tanB=7/5问角A=?角B=?精确到1"
tanA=5\7,tanB=7/5问角A=?角B=?精确到1"
tanA=5\7,tanB=7/5问角A=?角B=?精确到1"
数学之美团为你解答
tanA = 5/7 ,∠A = 35°32′16″
tanB = 7/5,∠B = 54°27′44″