Question

1) sin180-cos90°= ?
2)$\sqrt{3}$*tg30°-cos60°= ?
3) cos45°+$\sqrt{3}.[tex]*sin60°=? 4) sin(-45°)+3cos(-45°)=? 5)[tex]  \sqrt{6}$ /3*tg405°*sin(-60°)*cos(-45°)=?
6) sin $\frac{ \pi}{2}$ -cos \frac{ 3 \pi }{2}=?
7) tg$\pi$+cos \pi =?
8) cos(- $\pi$ )+sin $\frac{ \pi }{2$}=?

Answer 1

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