グラフがでます。 0<=θ<=π,y=sinθ+sin2θ+sin3θ https://ja.wolframalpha.com/input?i=0%3C%3D%CE%B8%3C%3D%CF%80%2Cy%3Dsin%CE%B8%2Bsin2%CE%B8%2Bsin3%CE%B8 0<=x<=π,y=sinx+sin2x+sin3x https://ja.wolframalpha.com/input?i=0%3C%3Dx%3C%3D%CF%80%2Cy%3Dsinx%2Bsin2x%2Bsin3x 0<=θ<=π,sinθ+sin2θ+sin3θ=0 https://www.wolframalpha.com/input?i=0%3C%3D%CE%B8%3C%3D%CF%80%2Csin%CE%B8%2Bsin2%CE%B8%2Bsin3%CE%B8%3D0&lang=ja
グラフがでます。
0<=θ<=π,y=sinθ+sin2θ+sin3θ
https://ja.wolframalpha.com/input?i=0%3C%3D%CE%B8%3C%3D%CF%80%2Cy%3Dsin%CE%B8%2Bsin2%CE%B8%2Bsin3%CE%B8
0<=x<=π,y=sinx+sin2x+sin3x
https://ja.wolframalpha.com/input?i=0%3C%3Dx%3C%3D%CF%80%2Cy%3Dsinx%2Bsin2x%2Bsin3x
0<=θ<=π,sinθ+sin2θ+sin3θ=0
https://www.wolframalpha.com/input?i=0%3C%3D%CE%B8%3C%3D%CF%80%2Csin%CE%B8%2Bsin2%CE%B8%2Bsin3%CE%B8%3D0&lang=ja