The equation, with a restriction on x, is the terminal side of an angle θ in standard position. −2x+y=0, x≥0. (I)Give the exact

Question

The equation, with a restriction on x, is the terminal side of an angle θ in standard position.  −2x+y=0, x≥0.
(I)Give the exact values of the six trigonometric functions of θ.
(II)Select the correct choice below and, if necessary, fill in the answer box to 
    complete your choice.
  (A.) sin θ=
  (Simplify your answer. Use integers or fractions for any numbers in the  expression. Type an exact answer, using radicals as needed. Ratio
  (B.) The function is undefined.

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