Question

Asked Dec 10, 2019

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From Euler’s formula e^it= cos(t) + isin(t) show that

a) cos(t)= 1/2(e^it+e^-it) then show cos(it)=cosh(t)= 1/2(e^t+e^-t) and cosh(it)= cos(t)

Step 1

Step 2

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