The value of [ sin(x + 60°) + sin(x + 2×60°) + sin(x + 3×60°) + … + sin(x + 14×60°) ] is
During the exam time do not click outside the page or don't open any other tab or window. If you will do this, then your exam will be locked.
> For each correct answer 2 marks will be awarded.
> For each wrong answer -1 mark will be awarded.