A-LevelMathematicsDifferential equationsMay/June 2021Paper 3 Q79 Marks
For the curve shown in the diagram, the normal to the curve at the point P with coordinates (x, y) meets the x-axis at N. The point M is the foot of the perpendicular from P to the x-axis. The curve is such that for all values of x in the interval 0 < x < ¼π, the area of triangle PMN is equal to tan x. [Figure X.X]
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