/pi*x\ tan|----| \2*a / / / x\\ lim |log|2 - -|| x->a+\ \ a//
Limit(log(2 - x/a)^tan((pi*x)/((2*a))), x, a)
/pi*x\ tan|----| \2*a / / / x\\ lim |log|2 - -|| x->a+\ \ a//
/pi*x\ tan|----| \2*a / / / x\\ lim |log|2 - -|| x->a-\ \ a//
Limit(log(2 - x/a)^tan((pi*x)/((2*a))), x, a, dir='-')