how do you find the zeros of cos z

Question : Find the zeros of cos z Solution : zeros of cos z are obtained by solving cos z = 0 Put cos z = (e^(iz) + e^(−iz))/2 e^(iz) + e^(−iz)=0 multiplying e^(iz) both sides  e(2iz)+1=0 e^(2iz) = −1…

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