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¿Por qué JavaScript calcula algunos valores de coseno y seno como un decimal, pero para otros un número entero?

Estoy usando x + (distance * Math.cos(orientation * Math.PI)) y y + (distance * Math.sin(orientation * Math.PI)) para calcular xx e yy respectivamente.

50 + (20 * Math.sin(1 * Math.PI)) y 50 + (20 * Math.cos(0.5 * Math.PI)) igual a 50

pero

50 + (20 * Math.sin(2 * Math.PI)) y 50 + (20 * Math.cos(1.5 * Math.PI)) igual 49.99999999999999 ?

Esperaba 50 aquí también. ¿Es una peculiaridad de javascript con la que necesito usar Math.ceil() (calculando coordenadas en un lienzo)?

about 4 years ago · Juan Pablo Isaza
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