Question

решить sin (pi/2+t)-cos(pi-t)+tg(pi-t)+ctg(5pi/2-t)

Answer 1

Решение
 sin (pi/2+t)-cos(pi-t)+tg(pi-t)+ctg(5pi/2-t) = cost + cost - tgt + tgt =2cost

Answer 2

 cos t-(-cos t) -tg t+tg t =2 cos t

Answer 3

а разве sin (pi/2+t)=-cost

Answer 4

конечно