import tkinter
import math

def trigo():
    d = float(entry.get())
    a = math.radians(d)
    s = math.sin(a)
    c = math.cos(a)
    t = math.tan(a)
    label_s['text'] = 'sin ' + str(s)
    label_c['text'] = 'cos ' + str(c)
    label_t['text'] = 'tan ' + str(t)

root = tkinter.Tk()
root.geometry('300x200')
root.title('三角函數的值')

entry = tkinter.Entry(width = 10)
entry.place(x = 20, y = 20)
button = tkinter.Button(text = '計算', command = trigo)
button.place(x = 110, y = 20)
label_s = tkinter.Label(text = 'sin')
label_s.place(x = 20, y = 60)
label_c = tkinter.Label(text = 'cos')
label_c.place(x = 20, y = 100)
label_t = tkinter.Label(text = 'tan')
label_t.place(x = 20, y = 140)

root.mainloop()