Question

There is a piece of tape attached to a hula hoop. The tape rotates to (_7, 20) during one spin. What is the sine value of this function?

Answer 1

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Below are the choices that can be found from other source:

−7
 20
 20 square root 449 over 449
 negative 7 square root 449 over 449

The answer seems to be the third one which is 20 square root 449 over 449.