In Trigonometry, inverse ratios are not longer covered according to NCS at FET level. This was one of the decisions that made mathematics to be a little bit below standard. I have been trying to solve the problem given last in June, 2008 P2, grade 11, trig problem was, if tan 25 = a, determine, in terms of a: (tan 205 - tan 115)/(tan 245 + tan 335). It became too cumbersome to evaluate this without using cotangent and 270. I am not sure if enough research was done so as to remove this powerful reciprocals knowledge.
But, I think we need to get used to living into the future and not complain too much. Math is hear to stay and curriculum can change with mankind needs and requirements.
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