Question 21 — IGCSE 0580 Oct/Nov 2025 Paper 22
Cambridge IGCSE Mathematics 0580, Extended tier, non-calculator. Topic: Trigonometry · Graphs of trigonometric functions. Worth 5 marks.
Open in interactive question bank →
Question text
21 (a)
y
1
O 180° 360° x
– 1
On the diagram, sketch the graph of y = cosx for 0° G x G 360°. [2]
(b) Solve the equation 2cosx+ 3 = 0 for 0° G x G 360°.
x = .................. or x = .................. [3]
M
SIHT
NI
ETIRW
TON
OD
NIGRAM
SIHT
NI
ETIRW
TON
OD
NIGRAM
SIHT
NI
ETIRW
TON
OD
Mark scheme
