Challenging +1.2 This question requires solving a non-standard trigonometric equation involving two different angles (x/6 and 2x) with different trig functions, which cannot be solved by standard algebraic manipulation. Students must recognize that trial of special angles is needed, testing values like x = π/12, -π/12, etc. While only worth 2 marks and having a small search space due to the restricted domain, the non-routine nature and need for strategic angle substitution makes it moderately harder than average.