2sin150-√3*sin(-120)*tg30=
[tex]2sin150=2sin(90+60)=2cos60=2*\frac{1}{2} =1[/tex]
[tex]\\-\sqrt{3} *sin(-120)=\sqrt{3} *sin(120)=\sqrt{3} *sin(180-60)=\sqrt{3} *sin60=\sqrt{3}*\frac{\sqrt{3} }{2} =1,5[/tex]
[tex]tg30=\frac{1}{\sqrt{3} }[/tex]
2sin150-√3*sin(-120)*tg30=1+1,5*(1/√3)=1+0,5√3
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2sin150-√3*sin(-120)*tg30=
[tex]2sin150=2sin(90+60)=2cos60=2*\frac{1}{2} =1[/tex]
[tex]\\-\sqrt{3} *sin(-120)=\sqrt{3} *sin(120)=\sqrt{3} *sin(180-60)=\sqrt{3} *sin60=\sqrt{3}*\frac{\sqrt{3} }{2} =1,5[/tex]
[tex]tg30=\frac{1}{\sqrt{3} }[/tex]
2sin150-√3*sin(-120)*tg30=1+1,5*(1/√3)=1+0,5√3