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# What does "tangent to the x axis" mean?

A tangent line is a line that touches but does not cross the graph of a function at a specific point. If a graph is tangent to the x-axis, the graph touches but does not cross the x-axis at some point on the graph.

Continue ReadingThe tangent of a circle always forms a 90 degree, or right angle, with the radius of the circle at that point. This tangent line is a geometric concept and should not be confused with the tangent of an angle from trigonometry. In trigonometry, the tangent, abbreviated tan, is the ratio of the sides of a triangle that are opposite and adjacent to a specific angle.

The tangent line is also an important concept in calculus. The first derivative in calculus is the slope of the tangent line at a specific point. This slope represents the instantaneous rate of change in a graph at that point. For example, in a graph of position versus time, the slope of the tangent line indicates the velocity at that specific moment in time. The x-axis is a horizontal line with a slope of zero. Therefore, if a graph is tangent to the x-axis, the graph has a slope of zero at that point.

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## How do you find the equation of the tangent line?

A: To find the equation of a line that is tangent to a curve, you must find a line with the same slope as that point of the curve. This can be done with a gra... Full Answer >Filed Under: -
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## How do you calculate a horizontal tangent line?

A: A tangent is a line that intersects a curve at only one point and does not pass through it, such that its slope is equal to the curve's slope at that point... Full Answer >Filed Under: -
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## How do you use a unit circle with tangent chart?

A: A unit circle can help solve values for the tangent of angles 30 degrees, 45 degrees and 60 degrees. Tan (θ) = x/y, sin (θ) = y and cos (θ) = x. By substit... Full Answer >Filed Under: -
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## How do you find the cosine of pi?

A: The trigonometric functions sine, cosine and tangent calculate the ratio of two sides in a right triangle when given an angle in that triangle. To find the... Full Answer >Filed Under: