Trigonometric Functions (id: dc50a9432)

本题目来源于试卷: Trigonometric Functions，类别为 IB数学

[问答题]
$\text { Solve the equation } \cos 2 x+\cos x=1+\sin 2 x-\sin x \text {, for } x \in[-\pi, \pi] \text {. }$

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