| Exam Board | AQA |
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| Module | Paper 2 (Paper 2) |
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| Year | 2018 |
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| Session | June |
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| Topic | Trig Proofs |
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1 Which of these statements is correct?
Tick one box.
$$\begin{aligned}
& x = 2 \Rightarrow x ^ { 2 } = 4
& x ^ { 2 } = 4 \Rightarrow x = 2
& x ^ { 2 } = 4 \Leftrightarrow x = 2
& x ^ { 2 } = 4 \Rightarrow x = - 2
\end{aligned}$$