Tg(-45) * sin390 * cos (-60)

Question

Tg(-45) * sin390 * cos (-60)

Answer 1

Ответ:

Объяснение:

tg(-45°)*sin(390°)*cos(-60°)=-tg45°*sin(360°+30°)*cos60°=

=-1*sin30°*(1/2)=-(1/2)*(1/2)=-1/4.