Question

Question #07236

Answer 1

`oo`

Explanation:

`Lim_(x->pi/2) ((xsinx)/cos x -pi/(4cos x))`

`lim_(x->pi/2) ((4xsin x -pi cos x)/(4cos x))`

`(4pi/2 sin (pi/2))/(4 cos (pi/2))`

`4/0`

`oo`