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## 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.