# Thread: [SOLVED] Trig Indentity Limits

1. ## [SOLVED] Trig Indentity Limits

Hi I don't get the correct answer for these 2. Could someone please show me.

Lim as x approach 0, (1-cosx)/(2x^2)..i get 0

Lim as x approach pi/2, (cosx)/((pi/2)-x)..i get -1

2. Originally Posted by Neverquit
Hi I don't get the correct answer for these 2. Could someone please show me.

Lim as x approach 0, (1-cosx)/(2x^2)..i get 0

Lim as x approach pi/2, (cosx)/((pi/2)-x)..i get -1
Use L'Hopital's rule. You'll have to use it twice on the first one.