Question

a' and 'b' are two mutually perpendicular unit vectors and it is given that u = pa + qb, where p and q are non zero real numbers. Calculate the angle between u and b. O Cos-1 B. cos' (a) 1 С. O cos' (b) D. O Cos (p2+q​

Answer 1

Answer:

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Step-by-step explanation:

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