Trigonometry C2 Exam Questions
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A-Level Edexcel C2 June 2007 Q9(a)
This question is on solving a trigonometric equation.
(a) Sketch, for 0 ≤ x ≤ 2π , the graph of y = sin(x + π/6)
(b) Write down the exact coordinates of the points where the graph meets the coordinate axes.
This question is on proving a trig. identity.
(a) Show that the equation
3 sin2 θ – 2 cos2 θ = 1
can be written as
5 sin2 &theta: = 3.
Hence solve, for 0° ≤ θ < 360°, the equation
3 sin2 θ – 2 cos2 θ = 1,
giving your answers to 1 decimal place.
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