two vectors a is equal to iCAP - J cap and b is equal to 2 i CAP - 2 J cap and a vector + b vector
(A) 3√2
(B)√3
(C)2√3
(D)3√3
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Answers
Answered by
0
Explanation:
resultent of two vectors will be 3root 2 so option a will be correct
Answered by
1
Answer:
a×b=
∣
∣
∣
∣
∣
∣
∣
∣
i
2
1
j
1
1
k
−2
0
∣
∣
∣
∣
∣
∣
∣
∣
=2i−2j+k
∴∣a×b∣=
4+4+1
=3
∣c−a∣=2
2
⇒∣c−a∣
2
=(c−a)
2
=8
⇒∣c∣
2
−2a.c+∣a∣
2
=8
⇒∣c∣
2
−2∣c∣+9=8
⇒∣c∣
2
−2∣c∣+1⇒∣c∣=1
∴∣(a×b)×c∣=∣(a×b)c∣sin30
o
=
2
3
Explanation:
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