- #1
Zhalfirin88
- 137
- 0
I know this probably pre-calc, but this was assinged to us in our calc class.
Find the lim as h approaches zero of [tex] x * cos x [/tex]
[tex] \frac{(x+h)cos(x+h)-(x cos x)}{h} [/tex]
[tex] \frac{x+h(cos (x) cos (h) + sin (x) sin (h)) -x *-cos (x))}{h} [/tex]
[tex] \frac{h(cos (x) cos (h) + sin (x) sin (h)) -cos (x)}{h} [/tex]
Don't know what to do next.
Homework Statement
Find the lim as h approaches zero of [tex] x * cos x [/tex]
The Attempt at a Solution
[tex] \frac{(x+h)cos(x+h)-(x cos x)}{h} [/tex]
[tex] \frac{x+h(cos (x) cos (h) + sin (x) sin (h)) -x *-cos (x))}{h} [/tex]
[tex] \frac{h(cos (x) cos (h) + sin (x) sin (h)) -cos (x)}{h} [/tex]
Don't know what to do next.