I have recently been given an assessment notification for 2u maths. It's an 'investigation-style examination' covering preliminary trigonometry concepts. My teacher says it's an open book, which has caused me to dread the exam because that means that the maths department has an excuse to make it especially tricky! Should I be worried or am I just being irrational? Surely the test couldn't be too hard in the interest in the class not having a dreadful average mark. Furthermore, what topics in trigonometry can render the most difficult/ band 6 questions and how should I prepare to cover any and all possibilities to ensure I get 85% or higher? Thank you. (It's in two weeks).
it shouldn't be that bad ngl, but be careful and try to get full marks on your hand in or open book thingy. often the exam ranges from easy to medium difficulty but the assignment is marked very precisely, any little mistakes and they usually tear you to shreds on it. in math exams as long as your general process and answer is right and you use a few shortcuts here and there you'll get the marks but for assignments you don't have that luxury. just be careful and show ALL working. doing this will also help you understand batter and help for your exam.
in terms of concepts hsc trig itself doesnt get too hard so prelim will be okay. key concepts are radians and converting to and from radians and degrees, unit circle, reciprocal identities, pythagorean identities. common question types are solving eq's, proving stuff, applications questions with a bunch of words, and questions where they give you one of the 3 main trig thingies and ask you to find the others (e.g sinx=3/5 , pi>x>pi/2, find exact value of secx and tanx)
good luck!