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5.4 Solving Trigonometric Equations

Medium
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Question 2
a.

Sketch the graph of

y=4cos⁡2x y = 4 \cos 2x y=4cos2x

for 0≤x≤3π20 \le x \le \frac{3\pi}{2}0≤x≤23π​.

[3]
b.

The equation

4cos⁡2x=k 4 \cos 2x = k 4cos2x=k

has exactly two solutions for the interval 0≤x≤3π20 \le x \le \frac{3\pi}{2}0≤x≤23π​. State the possible values of kkk.

[1]

5.4 Solving Trigonometric Equations Questions

  1. A Level
  2. /Maths
  3. /5.4 Solving Trigonometric Equations

Practise Edexcel A Level Maths 5.4 Solving Trigonometric Equations with exam-style questions for A Level Maths. 5 questions, matched to the Edexcel A Level Maths (9MA0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

Question bank