>lim (a->+infinity) (sin(x))^a = > 0 when -1 < sin(x) < 1 (x =/= (2k+1)pi/2) > 1 when sin(x) = 1 (x = (4k+1)pi/2) > no limit when sin(x) = -1 (x = (4k+3)pi/2) So it should say: sin(x)^% = undef sin(x)^-% = undef (%=infinite) ? Wouter _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.