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tmua.fyi Paper 1 Challenge 2 · Q18

Paper 1TrigonometryGeometry

An angle θ\theta satisfies sin⁡θ+sin⁡2θ=1\sin\theta+\sin^2\theta=1. Find cos⁡2θ+cos⁡4θ\cos^2\theta+\cos^4\theta.

A11
B00
C12\frac12
D22
E32\frac32
F5−2\sqrt5-2
G3−52\frac{3-\sqrt5}2
Hit depends on θ\theta

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