Find the tangent line to the unit circle at the point $(1, 0)$.
Answer 1
The equation of the unit circle is $x^2 + y^2 = 1$.
The point (1,0) is on the unit circle.
The slope of the tangent line at any point (a,b) on the circle can be found by implicit differentiation:
$2x + 2y \frac{dy}{dx} = 0 \Rightarrow \frac{dy}{dx} = – \frac{x}{y}$
At the point (1,0), the slope is undefined (vertical line).
Therefore, the equation of the tangent line is $ x = 1 $
Answer 2
The unit circle is defined by $ x^2 + y^2 = 1 $.
Let’s determine the tangent line at the point (1, 0).
By differentiating $ x^2 + y^2 = 1 $, we get $ 2x + 2y frac{dy}{dx} = 0 $
Simplifying gives $ frac{dy}{dx} = – frac{x}{y} $
For the point (1, 0), the slope is undefined because we cannot divide by zero.
Therefore, the tangent line is a vertical line passing through x = 1, so the equation is $ x = 1 $
Answer 3
Given the unit circle $ x^2 + y^2 = 1 $,
we find the tangent line at (1, 0).
Differentiating, $ 2x + 2y frac{dy}{dx} = 0 $
$ frac{dy}{dx} = – frac{x}{y} $
At (1, 0), the slope is undefined,
thus the tangent line is vertical at $ x = 1 $
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