questions 6iii), i dont have a clue where to start
and the whole of question 9
I am struggling to see any difficulty with 9
Do you know the formula for Cos(A+B)
Do you know what the Trig ratios for 30 and 60 are
Use (i) is it not obvious what theta =
(iii) and (iv)
am I just using the formula on 4cos(o+60) and cos(o+30)?