Rotation Matrix from Angle

Problem

Build the 2x2 counterclockwise rotation matrix for theta degrees:

R = [[cos(t), -sin(t)], [sin(t), cos(t)]]

with t = radians(theta).

Hint

The matrix is orthogonal with determinant 1.

case 1

in: [90]

expected: [[0,-1],[1,0]]

case 2

in: [0]

expected: [[1,0],[0,1]]

case 3

in: [180]

expected: [[-1,0],[0,-1]]

case 4

in: [45]

expected: [[0.7071067811865476,-0.7071067811865476],[0.7071067811865476,0.7071067811865476]]

Starter codePython

def rotation_matrix_2d(theta_degrees):
    # Your code here
    pass

4 test cases · run your code against them in the editor