When exams are round the corner then it is not possible to revise complete books so we have come up with unit wise formulas and important terms. Once you have gone through chapters thoroughly and understood it well there is no need to study it again and again. You can only revise important formulas and terms which will save your precious time.
Find revision notes for unit Coordinate Geometry-I in this article. This unit includes chapters – Straight lines and Circles. All formulae and important terms from these chapters are covered in this revision notes. In UPSEE and WBJEE where most of questions are asked directly on formulae, this quick revision note is very important.
Q (x2, y2) internally, in the ratio m: n are
The equation of a line passing through point (x, y) and have slope m is
The equation of a line passing through points (x1, y1) and (x2, y2) is
The equation of a line with slope m and c as y-intercept is
y = mx + c
The equation of the line making intercepts a and b on x-and y-axis, respectively, is
The equation of the line having normal distance p from the origin and angle θ which the normal makes with the positive direction of x-axis is given by
x cosθ + y sinθ = p
The required equation of the circle with centre at (h, k) and radius r is
(x – h)2 + (y – k)2 = r2
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