The position vectors of points P and Q relative to the origin O are (4 2) and (k 2) respectively. Given that ⃗QP⃗⃗⃗⃗ is perpendicular to ⃗OP⃗⃗⃗⃗, use a scalar or dot product to find:
i. the value of k
ii. the magnitude of QO⃗⃗⃗⃗⃗⃗ and of ⃗QP⃗⃗⃗⃗
iii. the angle OQP to the nearest degree.?
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Asked by Alex on 4th June, 2021
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