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January 19, 2017
Posted by **sh** on Friday, April 9, 2010 at 4:59am.

lim x->(pi/2) [((pi/2)-(x))/cosx]

May I please get a hint on how to start this question?

- Calculus -
**Damon**, Friday, April 9, 2010 at 4:32pmhint:

cos x = sin (pi/2-x)