TMUA-P2-ERR2-021 — Paper P2 · Common fallacies · Level 3

Options

1. A
   $x=k\pi$ or $x=\pi/8+k\pi/4$ ($k \in \mathbb{Z}$); the family $5x=\pi-3x+2k\pi$ was omitted.
2. B
   $x=k\pi$ only — the solution is complete.
3. C
   $x=0$ only.
4. D
   $x=\pi/8+k\pi/4$ only; the first family is extraneous.

Letters only — the answer key is hidden. Work it out, then check the solution below.

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