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Find the exact value of each expression, if it is defined. (If an answer does not exist, enter DNE.) (a) tan-1 -1 (b) cos-1/ V2

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Find the exact value of each expression, if it is defined. (If an answer does not exist, enter DNE.) (a) tan-1 -1 (b) cos-1/ V2 2 (c) tan (tan 3x) (d) cos(tan (-\\ 3))

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