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Geometry Level 5

If the value of the given expression is a, then what is a\lfloor a \rfloor?

Details And Assumptions:

  1. x,yx,y are cartesian plane co-ordinates.

  2. Expression given here is a real-valued one, not complex-valued.

  3. sin1x,cos1xsin^{-1}x,cos^{-1}x are defined on [1,1][-1,1]


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