为什么我的代码与我的计算器和在线计算器相比是错误的，有人可以告诉我它有什么问题吗

Question

 from math import cos
 from math import  sin
 from math import pi
 a0 = int(input("a0:"))
 b0 = int(input("b0:"))
 N = int(input("N:"))
 L = int(input("L:"))
 X = int(input("X:"))
 n = 0
 an = a0
 bn = b0
 y=0
 for i in range(N):
    n = n+1
    an = an + 10   
    bn = bn * 10   
    y = an * (cos(((n*pi*X)/(L))))+ (bn*(sin((n*pi*X)/(L))))
 total = a0 + y
 print(total)

Im assuming that the y =.... code is wrong since the an and bn code works fine lmk Equation

Answer 1

Since this is a sum you need to be keeping track of that inside the loop. Right now y will just be the result of that last iteration.

 from math import cos
 from math import  sin
 from math import pi
 a0 = int(input("a0:"))
 b0 = int(input("b0:"))
 N = int(input("N:"))
 L = int(input("L:"))
 X = int(input("X:"))
 n = 0
 an = a0
 bn = b0
 y=0
 for i in range(N):
    n = n+1
    an = an + 10   
    bn = bn * 10   
    y += an * (cos(((n*pi*X)/(L))))+ (bn*(sin((n*pi*X)/(L))))
 total = a0 + y
 print(total)