Let ^a and ^b be two unit vectors. If the vectors →c=^a+2^b and → – InterviewSolution

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1.	Let ^a and ^b be two unit vectors. If the vectors →c=^a+2^b and →d=5^a−4^b are perpendicular to each other, the angle between ^a and ^b is:
Answer» Let $^a$ and $^b$ be two unit vectors. If the vectors $\to c =^a + 2^b$ and $\to d = 5^a - 4^b$ are perpendicular to each other, the angle between $^a$ and $^b$ is:

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