Python：尝试将结果和角度转换为原始 i 和 j 值。

Question

我正在尝试让 python 将结果值和角度值取为 return 向量的原始 i 和 j 值。我可以让它从 i 和 j 值到结果和角度，但反过来就很棘手了。

    #vector conversion (x,y) to resultant and angle#
import math

menu = input('Vector Conversion: for vector to (x,y) press 1. \n                   for (x,y) to vector press 2.')
if menu == '2':
    user_distancex = float(input('What is the distance in x-direction?'))
    user_distancey = float(input('What is the distance in y-direction?'))

    r = (math.sqrt(user_distancex**2 + user_distancey**2))  
    theta = math.atan(user_distancey/user_distancex)*(180/math.pi)

    print(r, 'feet',theta, 'degrees')
elif menu == '1':

    user_angle = float(input('What is the angle of your vector?'))
    user_resultant = float(input('What is the distance (resultant) of your vector'))
    x_dist = user_resultant*math.cos(math.degrees(user_angle))
    y_dist = user_resultant*math.sin(math.degrees(user_angle))
    print((x_dist,y_dist))

Answer 1

math.degrees(user_angle) 将您的用户角度从弧度转换为度数。但是如果用户输入度数，它已经是度数了！

您应该改用 math.radians(user_angle)。

它也有助于澄清您的输入提示：

user_angle = float(input('What is the angle of your vector (in degrees)?'))

Python：尝试将结果和角度转换为原始 i 和 j 值。

Python : Trying to convert resultant and angle to original i and j values.

python

vector

angle