In Sec. 37. use expressions ( 13) and ( 14) to derive
Chapter 0, Problem 3.52(choose chapter or problem)
In Sec. 37. use expressions ( 13) and ( 14) to derive expressions ( 15) and ( 16) for I sin.:: 1 2 and jcos.::12. S11gge.\'fio11: Recall the identities sin 2 x + cos2 x = I and cosh 2 y - sinh2 y = I.
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