- #1
wajed
- 57
- 0
Homework Statement
Lim [(tanx)^2] / [1 + secx] <<< as x goes to pi
Homework Equations
The Attempt at a Solution
(tan x)^2 = (sin x)^2 / (cos x)^2
(sin x)^2 = y
lim y = 0 <<< as x goes to pi
lim [y/ (cos x)^2] / [1 + (1/y)] <<< as y goes to C=0
1+ (1/y) = (y+1)/y
lim [y^2] / (y+1) (cos x)^2
y=0
so, 0/(0+1)(cos 0)^2 = 0/1(1) = 0/1 = 0
why does my book mentions that answer is -2?