Euler's Cosine and Sine identities

How do I show that A = B?

%% Problem 9_Lecture_9/14/20

display('Problem 9_Lecture_9/14/20')

syms A t ;

A=cos(5*t)

B=exp((j*5*t)+exp(-j*5*t))/2

Answer 1

[madhan ravi]

 rewrite(A, 'exp')