Understanding Engineering Mathematics

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

24. 2

(

π+ 2 kπ

4

)

or±

√

2 ( 1 ±j)

√2 (− 1 + j)

√2 (1+ j)

√2 (1− j)

√2 (− 1 − j)

y

0 x