通过这种方法, θ从0步进到x = r cosθy = r sinθ其中θ=当前角度r
共享资源 若 op = r = 1,则 y p(a,b) mp sin α = op om cos α = op
p(x,y) r x2 y2 sinα= y/r y α x cosα=x/r tanα=y/x
平面直角坐标系sinα=yr,cosα=xr,tanα=yx;cscα=1sinα=ry,secα=
(0,pi/4)dθ∫(sinθ/cosθ,1) rdr
通过这种方法, θ从0步进到x = r cosθy = r sinθ其中θ=当前角度r
共享资源 若 op = r = 1,则 y p(a,b) mp sin α = op om cos α = op
p(x,y) r x2 y2 sinα= y/r y α x cosα=x/r tanα=y/x
平面直角坐标系sinα=yr,cosα=xr,tanα=yx;cscα=1sinα=ry,secα=
(0,pi/4)dθ∫(sinθ/cosθ,1) rdr