my rotation matrix for numpy (python) isn't working

Question

i was making a program to display matrices under various transforms, and all of them work except for my rotation matrix. ive tried fiddling with it, but nothing seems to work

y = input("how many degrees do you want to rotate the shape around the origin?:    ")
j = array([(cos(int(y)), -sin(int(y))), (sin(int(y)), cos(int(y)))])
print(j.dot(w))
input("enter to exit")

Answer 1

As the python documentation for cos and sin point out, the arguments should be in radians, not degrees.

You can use the math.radians function to convert degrees to radians.