Question 19 — IGCSE 0580 Oct/Nov 2023 Paper 21
Cambridge IGCSE Mathematics 0580, Extended tier, non-calculator. Topic: Trigonometry · Graphs of trigonometric functions. Worth 4 marks.
Open in interactive question bank →
Question text
19 (a)
y
1
x
0
360°
– 1
Sketch the graph of y = cosx for 0° G x G 360°.
[2]
(b) When cosx = 0.21 , find the reflex angle x.
................................................. [2]
Mark scheme
