Question

Ctg(3п/2)+tg(-п/4)-cos(-п /3)*sin(п/6)

Answer 1

$ctgfrac{3pi}{2}+tg(-frac{pi}{4})-cos(-frac{pi}{3})*sinfrac{pi}{6}\0+1-frac{1}{2}*frac{1}{2}=frac{3}{4}$