I remember formulae..................................................but can't remember what the heck they were for?
-b + or - the square root of b squared-4ac over Cos of 'A'..................................

What the heck was that all about then???????????

-b + or - the square root of b squared-4ac over Cos of 'A'..................................


What the heck was that all about then???????????


Trigonometry got really comlicated when later in my working life it went from Cosine,Sine and Tangent to Cotan and all the other permutations of the three.


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