Edexcel IALMathematicsGeneral Applications5 Marks
Solve, for 0 ≤ x < 360°, the equation 2sin(x + 30°) = 1.
- (a)Solve, for 0 ≤ x < 360°, the equation 2sin(x + 30°) = 1.[5]
Mark scheme
Marking points from the official mark scheme. The mark or mark type is shown in brackets.
- M1 for sin(x + 30°) = 0.5.
- A1 for (x + 30°) = 30° or 150° (accept one correct value for this A1).
- M1 for solving for x using both principal values, e.g., x = 30° - 30° and x = 150° - 30°.
- A1 for x = 0°.
- A1 for x = 120° (and no other solutions within the range).
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