Image:Circle 2.png

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In[15]:= ϕ=π/5; x=Cos[ϕ]; y=Sin[ϕ]; In[48]:= \!\(Show[Graphics[{\[IndentingNewLine]Circle[{0, 0}, 1], \[IndentingNewLine]PointSize[0.03], \[IndentingNewLine]Line[{{x, 0}, {x, y}, {0, 0}}], \[IndentingNewLine]Point[{x, y}], \[IndentingNewLine]Text[ StyleForm["\<1\>", FontSize \[Rule] 13], { x/2 + 0.15, y/2}], \ \[IndentingNewLine]Text[StyleForm[\*"\"\<\!\(x\_1\)\>\"", FontSize \[Rule] 13], {x, \(- .1\)}], \[IndentingNewLine]Text[ StyleForm[ "\<1\>", FontSize \[Rule] 13], {x/2 + 0.15, y/2}], \ \[IndentingNewLine]Text[StyleForm[\*"\"\<\!\(y\_1\)\>\"", FontSize \[Rule] \ 13], {\(- .1\), y}], \[IndentingNewLine]}], AspectRatio \[Rule] Automatic, Axes \[Rule] True, Ticks \[Rule] {{{x, "\<\>"}, {\(-1.05\), 1}, { 1.05, 1}}, {{y, "\<\>"}, {\(-1.05\), 1}, {1.05, 1}}}]\)

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