设倾斜角为θ(0≤θ＜π)则sinθ=3/5那么θ可能是锐角或钝角(i)若θ是锐角则cosθ=√[1-(sinθ)^2]=√[1-(3/5)^2]=4/5故tanθ=sinθ/cosθ=3/4即斜率是k=tanθ=3/4所以直线方程是y-3=(3/4)*(x+1)即3x-4y+15=0(ii)若...