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(c) Use the quotient rule: (1+tan t)(1 – tant) – (1+tan t) , (1 – tant) d (1+tant dt (1-tant (1 – tan t)2 cos?; (– tan 1) – (Hello, I need assistance understanding this textbook problem. I understand everything until the final step. I do not see how they were able to arrange the equation to get a 2 on top. Please assist with the identities used.


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