How do you find a dervative of this

[janemba]

how do you find the derivative of this problem and what rule do you use

lim sin(pi+h)-Sin pi
h-> 0 h

 

[tiny-tim]

… sinπ = 0 …

Hi janemba!

Do you mean $$\frac{sin(\pi + h) -sin\pi}{h}$$ ?

If so, remember that sinπ = 0, so it's just $$\frac{sin(\pi + h)}{h}\,.$$

Which is … ?

 

[janemba]

yes but how did you got the answer

 

[rocomath]

How do you expand:

$$sin(x+y)=?$$

Trig identity ...

 

[Gib Z]

It's even simpler than that, take a look at a unit circle and think about what happens with every rotation of pi radians.