HAL Electrical engg questions |   10139

HAL Electrical engg questions

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1. Find the z-transform of an cos nq.

(a) (z-a cos q) / z2 - 2za cos q

(b) z(z - a) / z2 - 2za + a2

(c) z(z - a cos q) / z2 - 2za cos q + a

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