### Mathematics Class XI

Unit-I: Sets and Functions
Chapter 1: Sets
Unit-II: Algebra
Chapter 5: Binomial Theorem
Chapter 6: Sequence and Series
Unit-III: Coordinate Geometry
Chapter 1: Straight Lines
Chapter 2: Conic Sections
Unit-IV: Calculus
Unit-V: Mathematical Reasoning
Unit-VI: Statistics and Probability
Chapter 1: Statistics
Chapter 2: Probability

# Locus

A set of points satisfying certain condition or conditions is called Locus.

A point belonging to the locus is called a ‘Point on the Locus’.

Chord of Locus:

A line–segment joining the two points of a Locus is a Chord of the Locus.

Equation of a locus:

The equation satisfied by the coordinates of all the points on a locus and by no others is called the equation of /to the locus.

Intercepts:

The  – intercept of a line is -axis of the point where it intersects the  -axis and its -axis intercept is the -coordinate of the point where it intersect the -axis.

A line parallel to -axis (horizontal line) has no -intercept.

A line parallel to -axis (vertical line ) has no – intercept.

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