Find all solutions of cos(3z + pi) =0
Solve for z: -cos(3 z) = 0 Multiply both sides by -1: cos(3 z) = 0 Take the inverse cosine of both sides: 3 z = pi/2+pi n for n element Z Divide both sides by 3: Answer: | z = pi/6+(pi n)/3 for n element Z
Pst. Could you please help me? (:
