- #1
EL ALEM
- 26
- 0
Homework Statement
Show that if f(x)=sinx then (f(x+h)-f(x))/h=((sin(h/2))/(h/2))(cos(x+h/2)
Homework Equations
Trig identities, possibly the half angle formulas?
The Attempt at a Solution
(f(x+h)-f(x))/h
= (f(x+ h/2 + h/2)-f(x))/(h/2 + h/2)
= (sin(x+ h/2 + h/2)-sin(x))/(h/2 + h/2)
im stuck after this, don't know what to do..