문제 풀이

(1)

=[(((-13)×(-14))-(8×11)), ((8×(-2))-(5×(-14))), ((5×11)-((-13)×(-2)))]

=[(182-88), ((-16)-(-70)), (55-26)]

=[94, 54, 29]

In [43]:

import numpy as np
a = np.array([5, -13, 8])
b = np.array([-2, 11, -14])
print(np.cross(a,b))

[94 54 29]

(2)

= [((8×2)-((-16)×(-5))), (((-16)×(-8))-((-7)×2)), (((-7)×(-5))-(-8×(-8)))]

= [(16-80), (128-(-14)), (35-(-64))]

= [-64, 142, 99]

In [44]:

import numpy as np
a = np.array([-7, 8, -16])
b = np.array([-8, -5, 2])
print(np.cross(a,b))

[-64 142 99]