If a-b-c-0- - a- -3- - b- -5- - c- -7- then the angle between a- b- is -

The correct option is B π /3 a⃗ +b⃗ = ⃗c⃗ Thus, |a⃗ +b⃗ | =| ⃗c⃗ |= 7 √( a ^ 2 + b ^ 2 +2abcosθ #160;) =7 which gives, 9 + 25 + 2 ...

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Domain and Range of Basic Inverse Trigonometric Functions

If a⃗+b⃗+c⃗...

Question

If $\to a + \to b + \to c = 0, | \to a | = 3, ∣ ∣ \to b ∣ ∣ = 5, | \to c | = 7,$ then the angle between $\to a$ & $\to b$ is :

π / 6

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2 π / 3

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5 π / 3

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π / 3

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Solution

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