Let →a and →c be unit vectors and |→b|=4 with →a×→b=2→a× – InterviewSolution

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1.	Let →a and →c be unit vectors and \|→b\|=4 with →a×→b=2→a×→c. The angle between →a and →c is cos−1(14). If →b−2→c=λ→a, then λ is equal to
Answer» Let $\to a$ and $\to c$ be unit vectors and $\| \to b \| = 4$ with $\to a \times \to b = 2 \to a \times \to c .$ The angle between $\to a$ and $\to c$ is ${cos}^{- 1} (\frac{1}{4}) .$ If $\to b - 2 \to c = λ \to a,$ then $λ$ is equal to

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