VectorHard
Question
= 0 and A + B - C = 0. What is the angle between 
and 
?Options
A.90o
B.0o
C.45o
D.tan-1 
Solution
C2 = A2 + B2 + 2AB cos θ 
and C = A + B
so, C2 = A2 + B2 + 2AB
than cos θ = 1 ⇒ θ = 0o
and C = A + B
so, C2 = A2 + B2 + 2AB
than cos θ = 1 ⇒ θ = 0o
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