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# substitution method and the quotient rule

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Using the appropriate substitution method and the quotient rule find the integral of:

Integral: 1+tanx/1-tanx dx

Note: you may use the relationship that:

tan(a+b) = tan(a) +tan(b)/1 -tan(a)tan(b) and tan(Pi/4) = 1

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This solution applies the substitution method and the quotient rule clearly.

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