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Archive4: Following questions are taken from Mathematics IEB Exam Paper of Nov. 1993.

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Queston 4
a) Prove the identity
b) Show that
c) Simplify
d) Solve the equation

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Question 5
a) Sketch the given graph for
then draw the horizontal line y = 5.
b) read the relevant values off your graph in part a) to solve the equation

Question 6
a) Express
b) Solve the equation
c) Graph the following on the same set of axes for

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