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The lecture Derivative of tan(x) by Batool Akmal is from the course Differentiation of Trigonometric Functions.
With knowing tan(x) = sin(x) /cos (x) , sin'(x) = cos(x), cos'(x) = sin(x) and using the quotient rule of derivatives (u/v)' = (u'v  uv')/v² , calculate the derivative of tan(x). Choose the correct answer.
What is the expansion of tan (x + y) = ?
What is the value of tan(x)/x as x tends to zero?
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