EN
Java - Math.sin() method example
0 points
Math sin is a static method that takes only one parameter and returns an approximation of sine mathematical function.
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public class MathExample {2
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public static void main(String[] args) {4
System.out.println( Math.sin( 0 ) ); // 0 <- 0 degrees5
System.out.println( Math.sin( 1.5707963267948966 ) ); // ~1 <- ~90 degrees == PI / 26
System.out.println( Math.sin( 3.1415926535897932 ) ); // ~0 <- ~180 degrees == PI7
System.out.println( Math.sin( 4.71238898038469 ) ); // ~-1 <- ~270 degrees == -PI * (3/2)8
System.out.println( Math.sin( 6.2831853071795850 ) ); // ~0 <- ~360 degrees == PI * 29
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System.out.println( Math.sin(-1.5707963267948966 ) ); // ~-1 <- ~-90 degrees == -PI / 211
}12
}Note:
1.2246467991473532e-16and-1.133107779529596e-15should be equal to0but they are not because of compuptation precision error.
| Syntax |
xxxxxxxxxx1 package java.lang;2 3 public final class Math {4 5 public static double sin(double number) { ... }6 7 }
|
| Parameters | number - double value that represents an angle in radians (primitive value). |
| Result |
If the function can not calculate it returns |
| Description | sin is a static method that takes only one parameter and returns an approximation of sin(x) mathematical function. |
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public class MathExample {2
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public static void main(String[] args) {4
double x1 = 0.0; // beginning of calculation in radians5
double x2 = Math.PI / 2; // ending of calculation radians6
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double dx = Math.PI / 9; // calculation step in degrees8
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for (double rad = x1; rad <= x2; rad += dx) {10
double y = Math.sin(rad);11
System.out.println("sin(" + rad + " rad) = " + y);12
}13
}14
}Output:
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sin(0.0 rad) = 0.02
sin(0.3490658503988659 rad) = 0.34202014332566873
sin(0.6981317007977318 rad) = 0.64278760968653934
sin(1.0471975511965976 rad) = 0.86602540378443865
sin(1.3962634015954636 rad) = 0.984807753012208xxxxxxxxxx1
public class MathExample {2
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static double calculateSin(double deg) {4
double radians = (Math.PI / 180) * deg;5
return Math.sin(radians);6
}7
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public static void main(String[] args) {9
// Example:10
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double x1 = 0.0; // beginning of calculation in degrees12
double x2 = 90.0; // ending of calculation degrees13
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double dx = 15.0; // calculation step in degrees15
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for (double deg = x1; deg <= x2; deg += dx) {17
double y = calculateSin(deg );18
System.out.println("sin(" + deg + " deg) = " + y);19
}20
}21
}Output:
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sin(0.0 deg) = 0.02
sin(15.0 deg) = 0.258819045102520743
sin(30.0 deg) = 0.499999999999999944
sin(45.0 deg) = 0.70710678118654755
sin(60.0 deg) = 0.86602540378443866
sin(75.0 deg) = 0.96592582628906837
sin(90.0 deg) = 1.0xxxxxxxxxx1
public class MathExample {2
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public static void main(String[] args) {4
double x1 = 0.0; // beginning of sine chart5
double x2 = 2 * 3.14; // end of sine chart6
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double dx = 3.14 / 4.0; // x axis step8
double dy = 1.0 / 5.0; // y axis step9
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for (double rad = x1; rad < x2; rad += dx) {11
double y1 = 0.0;12
double y2 = Math.sin(rad) + 1;13
StringBuilder line = new StringBuilder();14
for(double y = y1; y < y2; y += dy) {15
line.append(" ");16
}17
System.out.println(line + "+");18
}19
}20
}Output:
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