We finished Chapter 11 – Addition Formulae (with the exception of Ex11E which is not required for the NAB and will be done after the NAB). The work covered included double angle formulae, trigonometric equations using the double angle formulae as well as the mixed exercise – this was Ex11G, H, I and J. Again I emphasized the need to have learnt the exact values for sine and cosine for angles of 30o, 45o, 60o, 90o and multiples thereof. The work can be found on the MyMaths website under Library – A Level – Core 3 – Trigonometry – Double Angle Formulae.
The class had been issued with a Practice NAB to have been completed by Friday 6th December, and we then went through this detailing where the marks are awarded and the threshold scores required for each outcome.
The actual NAB will be on Tuesday 10th December. This will be followed with an Extended Unit Test to more accurately see how well each individual is coping with the course thus far as the NAB is just assessing minimum competence.
Next week we will spend two of the lessons spending a bit more time finishing off the chapter with extra practice on the mixed exercise before starting the next unit beginning with Vectors (this will also be included in the Prelim in February).
