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What is the speed of Arcturus;? What is the enswer for the equation y=x+4and x+y=2? Let theta be an angle in quadrant III such that tan theta =3/4. find the exact value of cos theta and csc theta? Find the equation of the line that passes through the point -2, 12 and -5, 21? What is the potential difference between xi = 2.0 m and xf = 3.0 m ?