Question

77. If vectors A and B have an angle between them,
then value of A - B will be
(a) 2 cos
(b) 2 tan
2
(c) 2 sin
2
(d) None of these​

Answer 1

Answer:

Explanation:

2cosθ2

2tanθ2

2sinθ2

None of these

Answer :

C

Solution :

(c )∣∣Aˆ−Bˆ∣∣=1+1−2×1×1×cosθ−1+1−2×1×1×cosθ√=2sin(θ)2

Angle between AˆandBˆalso θ but their magnitudes are 1.

Answer 2

Answer:

2cosθ2

2tanθ2

2sinθ2

None of these

Answer :

C

Solution :

(c )∣∣Aˆ−Bˆ∣∣=1+1−2×1×1×cosθ−1+1−2×1×1×cosθ√=2sin(θ)2

Angle between AˆandBˆalso θ but their magnitudes are 1.

Explanation:

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