[acos-asin-atan-atan2-computed.html]
  [calc(atan2(0,-1)) should be used-value-equivalent to -180deg]
    expected: FAIL

  [calc(sin(atan(tan(pi/2)))) should be used-value-equivalent to 1]
    expected: FAIL

  [atan2(1rem + 1px - 1px, -1rem) should be used-value-equivalent to 135deg]
    expected: FAIL

  [atan2(1vh + 0px, -1vh + 0px) should be used-value-equivalent to 135deg]
    expected: FAIL

  [calc(asin(sin(180deg * sibling-index()))) should be used-value-equivalent to 0deg]
    expected: FAIL

  [calc(acos(cos(180deg * sibling-index()))) should be used-value-equivalent to 180deg]
    expected: FAIL

  [calc(atan(tan(180deg * sibling-index()))) should be used-value-equivalent to 0deg]
    expected: FAIL