Question

Вычислите:
tg п ctg п/4+ cos п/2 sin(-2п/3)

Answer 1

tg pi = 0;
ctg pi/4 = 1;
cos pi/2 = 0;
sin(-2pi/3) = - 1/2;

= 0 *1 + 0 *(-1/2) = 0