Question Detail
Question
What is the formula for the equation of the tangent to the circle x² + y² = a² at the point (x₁, y₁)?
Correct Answer
Option C is the correct answer.
Detailed Explanation
For the circle x² + y² = a², the equation of the tangent at the point (x₁, y₁) on the circle is given as xx₁ + yy₁ = a².
Hint
It is a simple transformation where x² becomes xx₁ and y² becomes yy₁.