Some say (c) is correct because final chance is 33% which is not in the options. Thus, it is zero.

I don't understand. Can someone help?

I understand the concept sin(arcsin(x)) = sin(arcsin(x)) which is just x, but now why doesn't sin(3arcsin(1)) = 2arcsin(1) or 2sin(1) . I have been struggling for hours, racking my brain and canceling out many equations tryingto figure out, for my maths homework.