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It was an Audio Device for the PLATO IV.
1050-1100 A.D. PLATO Answers FTW
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The Roman numeral IV represents the number 4. If however you are referring to IV medical treatment you have placed the question in the wrong category.
Consider angles in standard position, and note that for the equation sin θ = 0.5, the angle in the first quadrant is θ = 30° The sin function is positive in quadrants I and II, and negative in quadrants III and IV, so there are two basic answers, one in quadrant III and another in quadrant IV. In quadrant III, the angle is 180° + 30° = 210° In quadrant IV, the angle is 360° - 30° = 330° Of course, this is a wave function so there are an infinite number of answers. You can add full circles (i.e. multiples of 360°) to either of these answers to get more answers. In quadrant III, the angles are 210°, 570°, 930°, ... In quadrant IV, the angles are 330°, 690°, 1050°, ...
Me too but what's that IV-2? -
One. Nicholas Breakspeare became Pope Adrian IV from 1154 to 1159. He was from Hertfordshire in England.
Pope Adrian IV, born Nicholas Breakspear.Pope Adrian IV was the only pope from Britain.
The numbers in English corresponding to "ii" are "two," "ix" is "nine," "vi" is "six," and "iv" is "four."
of course you can i do it everyday its fine iv em 2 its great