Explain what is WRONG with the following solution. Solve

Chapter 6, Problem 5

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Explain what is WRONG with the following solution. Solve tan 2u = 2 over the interval 30, 2p2. tan 2u = 2 Original equation tan 2u 2 = 2 2 Divide by 2. tan u = 1 Perform the division. u = p 4 or u = 5p 4 Definition of inverse tangent The solution set is 5p4 , 5p 4 6.

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