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a=tg alfa
a=tg30= \/3 /3 \/ - pierwiastek
zatem y=(\/3 /3)x+b
przechodzi przez A(\/3,2)
podstawiamy do rownania prostej
x=\/3 y=2
2=(\/3 /3 )*\/3 +b
2=3/3 +b
2=1+b
2-1=b
b=1
stad
y=(\/3 /3)x+1