The radius is always perpendicular to …
CBSE, JEE, NEET, CUET
Question Bank, Mock Tests, Exam Papers
NCERT Solutions, Sample Papers, Notes, Videos
Posted by Abhishek Gupta 4 years, 10 months ago
- 1 answers
Related Questions
Posted by Rahul Rajput an hour ago
- 1 answers
Posted by Rajan Dubey 2 days, 2 hours ago
- 1 answers
Posted by Paru Devi Ninama Ninama 2 days, 7 hours ago
- 0 answers
Posted by Somya Agrawal an hour ago
- 0 answers
Posted by Account Deleted an hour ago
- 0 answers
Posted by Sandhya Vishwakarma 2 days, 7 hours ago
- 0 answers
Posted by Apeksha S 48 minutes ago
- 0 answers
Posted by Siddharth Singh 1 day, 1 hour ago
- 0 answers
myCBSEguide
Trusted by 1 Crore+ Students
Test Generator
Create papers online. It's FREE.
CUET Mock Tests
75,000+ questions to practice only on myCBSEguide app
Sia ? 4 years, 10 months ago
Given A radius OP of a circle C (O, r) and a line APB, perpendicular to OP.
To Prove AB is a tangent to the circle at the point P.
PROOF Take a point Q, different from P, on the line AB.since radius through the point of contact of tangent is perpendicular to it. Therefore,
{tex} O P \perp A B{/tex}.
{tex}{/tex}We know that among all the line segments joining O to a point on AB, OP is the shortest one. Therefore,
{tex}{/tex} OP < <oq>OQ
{tex}{/tex}{tex}\Rightarrow{/tex} OQ > OP</oq>
{tex}\Rightarrow{/tex}Q <oq>lies outside the circle.
Therefore, every point on AB, other than P, lies outside the circle. This implies that AB meets the circle only at the point P.
Hence, AB is a tangent to the circle at P.</oq>
0Thank You