# What is the derivative of this function #y= (1+sin x)/(1-sin x)#?

If you are studying maths, then you should learn the Quotient Rule for Differentiation, and practice how to use it:

I was taught to remember the rule in word; " vdu minus udv all over v squared ". To help with the ordering I was taught to remember the acronym, VDU as in Visual Display Unit.

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The derivative of the function y = (1 + sin(x))/(1 - sin(x)) with respect to x is:

(dy)/(dx) = [(1 - sin(x))(cos(x)) - (1 + sin(x))(cos(x))]/(1 - sin(x))^2

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