Hey guys I am new in this forum so if i posted this question in the wrong section, please notify me. Anyway.(adsbygoogle = window.adsbygoogle || []).push({});

My concern here is this.

So I am trying to find the RATE OF CHANGE of f from pi to 11pi/6

f(x)= tan x

I have attached the part i need help on.

Note: This is very simple but there is one step which i don't understand.

The part where 11pi/6 - pi = 5pi/6 <----- How is this? Please explain.....

thanks in advance.

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# Homework Help: Trigonometry quetion

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