- #1
fermio
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Homework Statement
[tex]\lim_{x\to\frac{\pi}{2}}(x-\frac{\pi}{2})\tan x[/tex]
Homework Equations
answer is (-1)
The Attempt at a Solution
[tex]\lim_{x\to\frac{\pi}{2}}(x-\frac{\pi}{2})\tan x= \lim_{x\to\frac{\pi}{2}}(x-\frac{\pi}{2})\cdot\frac{1-\cos(2x)}{\sin(2x)} [/tex]