how do you find the zeros of cos z

Question : Find the zeros of cos zSolution :zeros of cos z are obtained by solvingcos z = 0Put cos z = (e^(iz) + e^(−iz))/2e^(iz) + e^(−iz)=0multiplying e^(iz) both sides e(2iz)+1=0e^(2iz) = −1put z=x+iy, i^2=-1e^(2ix −2y)=-1e^(2ix )=-e^(2y)We shall compare real and…

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