Understanding Engineering Mathematics

(やまだぃちぅ) #1

23.(i) cos 7α+jsin 7α (ii) sin 2α−jcos 2α (iii) sinα+jcosα



  1. 2


(
π+ 2 kπ
4

)
or±


2 ( 1 ±j)

√2 (− 1 + j)
√2 (1+ j)

√2 (1− j)
√2 (− 1 − j)

y

0 x
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