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Angle between Two Lines

The non-zero ...

Question

The non-zero vectors $¯ ¯ ¯ a, ¯ ¯ b$ and $¯ ¯ c$ are related $¯ ¯ ¯ a = 8 ¯ ¯ b$ and $¯ ¯ c = - 7 ¯ ¯ b$ . Then the angle between $¯ ¯ ¯ a$ and $¯ ¯ c$ is -

A

0

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B

\frac{π}{4}

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C

\frac{π}{2}

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D

π

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Solution

The correct option is A $0$
Let the $¯ ¯ ¯ a,$ $¯ ¯ b$ and $¯ ¯ c$ be the non-zero vector
$¯ ¯ ¯ a = 8 ¯ ¯ b$
$¯ ¯ c = - 7 ¯ ¯ b$
Angle $= 0$
Hence,
option $A$ is correct $.$

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