周期関数と三角関数

sin θ のグラフ

Plot[Sin[θ], {θ, -Pi, 3  Pi}, 
      AspectRatio -> Automatic, ImageSize -> {400, Automatic}, 
      PlotRange -> {-2, 2}, 
      Ticks -> {{-Pi, -Pi/2, 0, Pi/2, Pi, 3  Pi/2, 2  Pi, 
            5  Pi/2, 3  Pi}, {-1, 0, 1}}]

cos θ のグラフ

Plot[Cos[θ], {θ, -Pi, 3  Pi}, 
      AspectRatio -> Automatic, ImageSize -> {400, Automatic}, 
      PlotRange -> {-2, 2}, 
      Ticks -> {{-Pi, -Pi/2, 0, Pi/2, Pi, 3  Pi/2, 2  Pi, 
            5  Pi/2, 3  Pi}, {-1, 0, 1}}]

tan θ のグラフ

Plot[Tan[θ], {θ, -Pi, 3  Pi}, 
      AspectRatio -> Automatic, ImageSize -> {400, Automatic}, 
      PlotRange -> {-4, 4}, 
      Ticks -> {{-Pi, -Pi/2, 0, Pi/2, Pi, 3  Pi/2, 2  Pi, 
            5  Pi/2, 3  Pi}, {-3, -2, -1, 0, 1, 2, 
            3}}]

sin(θ+(π/2)) とsin θ のグラフ

Plot[{Sin[θ + Pi/2], Sin[θ]}, {θ, -Pi, 3  Pi}, 
      AspectRatio -> Automatic, ImageSize -> {400, Automatic}, 
      PlotRange -> {-2, 
          2}, 
PlotStyle -> {{RGBColor[0, 0, 
              1]}, {RGBColor[1, 0, 0]}}, 
      Ticks -> {{-Pi, -Pi/2, 0, Pi/2, Pi, 3  Pi/2, 2  Pi, 
            5  Pi/2, 3  Pi}, {-1, 0, 1}}]

sin(θ-(π/2)) とsin θ のグラフ

Plot[{Sin[θ - Pi/2], Sin[θ]}, {θ, -Pi, 3  Pi}, 
      AspectRatio -> Automatic, ImageSize -> {400, Automatic}, 
      PlotRange -> {-2, 
          2}, 
PlotStyle -> {{RGBColor[0, 0, 
              1]}, {RGBColor[1, 0, 0]}}, 
      Ticks -> {{-Pi, -Pi/2, 0, Pi/2, Pi, 3  Pi/2, 2  Pi, 
            5  Pi/2, 3  Pi}, {-1, 0, 1}}]