Old Exam Questions #6

First, my solution to Old Exam Question #5

1971

(Click to enlarge)

sol1

sol2

sol3

The only annoying part was the counter-intuitive naming of the diagram (OXZY) Supposedly to make it clearer once they throw in the axis.

Did you solve it differently?

Here is the next question, from a 1966 O Level maths exam:

1966

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2 thoughts on “Old Exam Questions #6

  1. Sorry to be a pain… butI think you’ve done this wrong…

    If S is the foot of the perpendicular from Q to OZ… I suggest the right-angle should be between QS and OZ, not at the point Q.

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