In 1943, with 16 year old childish optimism, we chanted, “Since Operations Have Commenced Adolph Has Taken Oxalic Acid.”

This memorable ditty provided:

Sin =

Oppo

Hypo

Cos = Adjac

Hypo

Tan = Oppo

Adjac

So even a child-like mind could see the flaw in your original answer (27 May).

How education has changed! It is some relief that the formula has not really changed, but why not a challenge for a updated jingle for the formula?

Thank you for your new publication helping to return a voice and recognition to the QS profession, which has been suppressed by our institution for too long.

Robin Campbell, QS (retired)