求过点A(1,2),且倾斜角的余弦角为3/5的直线方程是
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求过点A(1,2),且倾斜角的余弦角为3/5的直线方程是
求过点A(1,2),且倾斜角的余弦角为3/5的直线方程是
求过点A(1,2),且倾斜角的余弦角为3/5的直线方程是
设倾斜角是a
则0
倾斜角的余弦角为3/5
正弦=√1-(3/5)平方=4/5
所以
正切值=(4/5)/(3/5)=4/3
所以
方程为
y-2=4/3 (x-1)
过点A(1,2),且倾斜角的余弦角为3/5的直线方程是
y=4x/3+2/3
k=tana=4/3