When are zeros significant when found to the trailing (to the right) of the decimal point?

Usually, zeroes are found to the right of a decimal point in significant numbers if you have something like (exaggerated example of course), which is when you have a number that is very very close to the integer before it, but isn't that integer.

The direction of motion of the ball is approximately 68.199º below the +x semiaxis.

Explanation:

The ball has a two-dimension motion, to be exact, a parabolical motion, that is, a motion at constant velocity in the x-direction and free fall motion in the y-motion. Hence, the horizontal velocity of the basketball is 12 meters per second and its direction (), in sexagesimal degrees, is calculated by this trigonometrical expression:

(1)

Where:

- Horizontal velocity, in meters per second.

- Vertical velocity, in meters per second.

If we know that and , then the direction of motion of the ball is:

(below the +x semiaxis)

The direction of motion of the ball is approximately 68.199º below the +x semiaxis.