A=2;B=5 then find d( A , B)
Answers
Answered by
1
Answer:
(A, B) =>(2, 5)
Step-by-step explanation:
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Answered by
0
Step-by-step explanation:
Given that
∣
a ∣=2,∣ b ∣=5
∣
a×b
ˉ
∣=8
Consider ∣
a×b
ˉ
∣=∣
a
ˉ
∣⋅∣
b
ˉ
∣⋅sinθ
⇒8=2⋅5sinθ
⇒
10
8
=sinθ
sinθ=
5
4
θ=sin
−1
(
5
4
)
a
ˉ
⋅
b
ˉ
=∣
a
ˉ
∣⋅∣
b
ˉ
∣cosθ
=2⋅5cos[sin
−1
(
5
4
)]
=10cos[cos
−1
(
5
3
)]
=10×
5
3
=6
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