Vectors a- and b- make an angle - -2-3- If - a- -1- - b- -2 then a-3b- - 3a-b- 2-

The correct option is C 300 {a⃗× 3a⃗ a⃗×b⃗ +9b⃗×a⃗ 3b⃗×b⃗ #160;} #160;^ 2 ={ a⃗×b⃗ +9b⃗×a⃗ #160;} #160;^ 2 #160; #160; #160; #160; ...

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Multiplication with Vectors

Vectors a⃗ ...

Question

Vectors $\to a$ and $\to b$ make an angle $θ = \frac{2 π}{3} .$ If $| \to a | = 1, ∣ ∣ \to b ∣ ∣ = 2$ then ${(\to a + 3 \to b) \times (3 \to a - \to b)}^{2} =$

225

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250

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275

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300

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Solution

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Similar questions

\to a

\to b

θ = \frac{2 π}{3}

| \to a | = 1, | \to b | = 2

{(\to a + 3 \to b) \times (3 \to a - \to b)}^{2} =

If $\to a a n d \to b$ are non-zero vectors such that $| \to a - 3 \to b | = | \to a + 3 \to b |$ , then the angle between $\to a a n d \to b$ is

| \to a + \to b | = | \to a - \to b |

(\to a, \to b) = \frac{π}{2}

\to a, \to b, \to a + \to b

(\to a, \to b) = \frac{2 π}{3}

If $\to a, \to b, \sqrt{3} \to a - \to b$ are unit vectors, then acute angle between the vectors $\to a$ and $\to b$ is

\to a

\to b

1

3

(1 - 3 \to a . \to b)^{2} + | 2 \to a + \to b + 3 (\to a \times \to b) |^{2} = 98

\to a

\to b

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