Question

Sin(п/2)- cos(3п/2)+cosП- tg0+ctg 2 (3п/2)

Answer 1

$Sin frac{ pi }{2} -Cos frac{3 pi }{2}+Cos pi -tg0+Ctg ^{2} ( frac{3 pi }{2} )= 1-0-1-0 +0=0$