回答編集履歴
1
test
CHANGED
@@ -1,14 +1,9 @@
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1
1
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題意を満たしているかどうかは判りませんが、こんな感じで。
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2
2
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```java
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3
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-
public double Norm(){
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4
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return Math.sqrt(this.InProd(this));
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5
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}
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6
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-
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7
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-
public double angle(vector v){
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3
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+
public double angle(vector v){
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8
4
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double theta;
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9
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-
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5
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vector vNorm = this.mul(Math.sqrt(v.InProd(v)));
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10
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// theta = Math.acos(theta);
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11
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theta = Math.acos(this.InProd(v) / th
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6
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theta = Math.acos(this.InProd(v) / Math.sqrt(vNorm.InProd(vNorm)));
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12
7
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theta = theta * 180.0 / Math.PI;
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13
8
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return theta;
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14
9
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}
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