A-Level
EDEXCEL
Mathematics & Further Mathematics
October 2021
QP-202110-Mathematics-UP3 · Question 10
Question (excerpt):
30 blank 10. O x y a Figure 4 Figure 4 shows a sketch of part of the curve with equation y = (1 + 2 cos 2x)2 (a) Show that (1 + 2 cos 2x)2 ≡ p + q cos 2x + r cos 4x where p, q and r are constants to b…
30 blank 10. O x y a Figure 4 Figure 4 shows a sketch of part of the curve with equation y = (1 + 2 cos 2x)2 (a) Show that (1 + 2 cos 2x)2 ≡ p + q cos 2x + r cos 4x where p, q and r are constants to b…
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