1) sin180-cos90°= ?2)*tg30°-cos60°= ?3) cos45°+ /3*tg405°*sin(-60°)*cos(-45°)=?6) sin ...

Question

1) sin180-cos90°= ?
2)*tg30°-cos60°= ?
3) cos45°+ /3*tg405°*sin(-60°)*cos(-45°)=?
6) sin -cos \frac{ 3 \pi }{2}=?
7) tg+cos \pi =?
8) cos(- )+sin }=?

Answer 1

Sin(180) - cos(90) = 0 - 0 = 0. (т. к. sin(180) = 0; cos(90) = 0.).