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Paper 2Core or Extended Mathematics3 marks
Graphing and solving trigonometric equations
Description
Graph of y = cos x
Consider the graph of y = cos x for x between 0° and 360°. The graph starts at y = 1 when x = 0°, decreases to y = 0 at 90°, reaches y = -1 at 180°, returns to y = 0 at 270°, and back to y = 1 at 360°.
- a[3]
Calculate Find all values of x between 0° and 360° that satisfy the equation 2 cos x + 1 = 0.
Aim for approximately 3 distinct marking points.
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Maths method check
- Topic focus: Trigonometric functions.
- Question style: structured_mathematics.
- Reasoning demand: reasoning.
- Check the operation, notation, units, and final answer form against the question before moving on.
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