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Question

What is tangent line and normal line?


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Solution

Tangent line: The line that touches the curve at exactly one point and has the same slope as the curve at that point is called the tangent line.

Tangent of a line y=mx+cat a point a,b is y-b=dydxa,bx-a.

Normal line: The line which is perpendicular to the tangent line is called the normal line.

Normal of a line y=mx+cat a point a,b is y-b=-dxdya,bx-a.


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