| Exam Board | WJEC |
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| Module | Unit 1 (Unit 1) |
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| Year | 2024 |
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| Session | June |
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| Topic | Chain Rule |
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- Given that \(y = 12 \sqrt { x } - \frac { 27 } { x } + 4\), find the value of \(\frac { \mathrm { d } y } { \mathrm {~d} x }\) when \(x = 9\).
- Find all values of \(\theta\) in the range \(0 ^ { \circ } < \theta < 180 ^ { \circ }\) that satisfy the equation
$$2 \sin 2 \theta = 1$$