User:Libxfs/tnt priming movement - minecraft.fandom.com

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EntityTNTPrimed.java:
public EntityTNTPrimed(World world, double d, double d1, double d2)
{
        this(world);
        setPosition(d, d1, d2);
        float f = Math.random() * 3.1415927410125732 * 2;
        motionX = -MathHelper.sin(f * 3.141593 / 180) * 0.02;
        motionY = 0.2;
        motionZ = -MathHelper.cos(f * 3.141593 / 180) * 0.02;
...

What's the problem of multiplying a radian with π/180?