from math import cos, sin,pi x0,y0=0,0 r=4.0 angle=-25 x1 = x0 + r * cos(angle * pi / 180) y1 = y0 + r * sin(angle * pi /180) print(x1) print(y1)
根据点的坐标画出圆的内接三角形：
import numpy as np import matplotlib.pyplot as plt x = y = np.arange(-5, 5, 0.1) x1=[-3.064177772475912,0,3.6252311481465997,-3.064177772475912] y1=[-2.571150438746157,4,-1.6904730469627978,-2.571150438746157] x, y = np.meshgrid(x,y) plt.contour(x, y, x**2 + y**2, [16]) #x**2 + y**2 = 9 的圆形
plt.plot(0,0,'r.') plt.plot(x1,y1,'r-') plt.axis('scaled') plt.show()
