As the tangent is a straight line, the equation of the tangent ... The radius that joins the centre of the circle (0, 0) to the point P is at right angles to the tangent, so the gradient of ...
As the tangent is a straight line, the equation of the tangent ... The radius that joins the centre of the circle (0, 0) to the point P is at right angles to the tangent, so the gradient of ...
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