Tip:A–D to answerE for explanationV for videoS to reveal answer
Let a and b be two vectors such that ∣a∣=14, ∣b∣=6 and ∣a×b∣=48. Then (a⋅b)2 is equal to:
- A.
36
(Correct Answer) - B.
35
- C.
34
- D.
33
Explanation
Solution
Isme hum Lagrange's Identity ka istemal karenge:
-
Values put karein:
(48)2+(a⋅b)2=(14)2×(6)2
-
Simplify karein:
-
Final Value:
Explanation
Solution
Isme hum Lagrange's Identity ka istemal karenge:
-
Values put karein:
(48)2+(a⋅b)2=(14)2×(6)2
-
Simplify karein:
-
Final Value:
