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What does the equation (x – a)2 + (y – b)2 = r2 become when the axes are transferred to parallel axes through the point (a - c, b)? |
Answer» Given: The equation, (x – a) 2 + (y – b) 2 = r2 The given equation (x – a)2 + (y – b)2 = r2 can be transformed into the new equation by changing x by x – a + c and y by y – b, i.e. substitution of x by x + a and y by y + b. ((x + a – c) – a)2 + ((y – b ) – b)2 = r2 (x – c)2 + y2 = r2 x2 + c2 – 2cx + y2 = r2 x2 + y2 -2cx = r2 – c2 Hence, the transformed equation is x2 + y2 -2cx = r2 – c2 |
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