tgπ/2 -tgx
=(sinx*cos3π/2 - cosxsin3π/2)* ------------------------ * (cosπ/2 cosx + sinπ/2sinx)+
1+tgπ/2 * tgx
+(sinxcosπ+cosxsinπ)²=cosx * -tg x * sinx+(-sinx)²=-sin²x +(-sinx)²=0
<span>5.4 : 2.4 = х : 1.6
5.4*1.6=2.4х
8.64=2.4х
х=8.64:2.4
х=3.6</span>
2.sin60+tg 45 - 2.cos 30= 2. V3/2 + 1 - 2. V3/2 = 1