 # Implicit Differentiation Exam Questions

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A-Level Edexcel C4 January 2010 Q3
The curve C has the equation
cos 2x + cos 3y = 1, -π/4 ≤ x ≤ π/4, 0 ≤ y ≤ π/6
(a) Find dy/dx in terms of x and y.

The point P lies on C where x = π/6
(b) Find the value of y at P.
(c) Find the equation of the tangent to C at P, giving your answer in the form ax + by + cπ = 0, where a, b and c are integers.

A-Level Edexcel C4 January 2010 Q3(a)
A-Level Edexcel C4 January 2010 Q3(b)
A-Level Edexcel C4 January 2010 Q3(c)

A-Level maths Edexcel C4 January 2007 Q5
A set of curves is given by the equation sin x + cos y = 0.5
(a) Use implicit differentiation to find an expression for dy/dx.

For -π < x < π and -π < y < π,
(b) find the coordinates of the pints where dy/dx = 0

A-Level maths Edexcel C4 January 2007 Q5a
The question is on implicit differentiation. A-Level Maths Edexcel C4 January 2008 Q5b
This question is on implicit differentiation

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