Ano ang cross product ng (4 i + 4 j + 2k) at (- 4 i - 5 j + 2k)?

Ano ang cross product ng (4 i + 4 j + 2k) at (- 4 i - 5 j + 2k)?
Anonim

Sagot:

#A X B = 18i-16j #

Paliwanag:

# A = (x, y, z) #

# B = (a, b, c) #

#A X B = i (y * c-z * b) -j (x * c-z * a) + k (x * b-y * a) #

# A = 4i + 4j + 2k #

# B = -4i-5j + 2k #

#A X B = i (8 + 10) -j (8 + 8) + k (-20 + 20) #

#A X B = 18i-16j + 0 #

#A X B = 18i-16j #