A certain oscillation results from the addition of coherent oscillations of the same direction K a cos wt (k 1) 1092 l, where k is the number of the oscillation (k i, 2, , N), 1092 is the phase difference between the kth and (k l)th oscillations Find the amplitude of the resultant oscillation

Question: A certain oscillation results from the addition of coherent oscillations of the same direction K = a cos [wt + (k 1) фl, where

A certain oscillation results from the addition of coherent oscillations of the same direction ∑K = a cos [wt + (k – 1) фl, where k is the number of the oscillation (k = i, 2, ..., N), ф is the phase difference between the kth and (k- l)th oscillations. Find the amplitude of the resultant oscillation.

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