14D- addition and double angle formulas
Objective: these formulas will help us to evaluate sin/cos/tan/sec/cosec/cot questions with angles composed of exact angles. such as 75 = 30 + 45. 15 = 45-30. 105 = 45 +60 etc...
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14C- Reciprocal functions
Objectives: to identify and remember the reciprocal functions of sine, cosine and tangent to derive and remember two more identities that consist of cosec(x), sec(x) and cot(x)