| Exam Board | OCR MEI |
|---|---|
| Module | C3 (Core Mathematics 3) |
| Marks | 3 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Trig Graphs & Exact Values |
| Type | Sketch or identify transformed graph |
| Difficulty | Moderate -0.8 This is a straightforward sketching question requiring only knowledge of the arccos function's basic shape and a vertical stretch by factor 2. The domain is given, and the key features (endpoints at (1,0) and (-1,2π), decreasing curve) follow directly from standard arccos properties with minimal transformation. |
| Spec | 1.05i Inverse trig functions: arcsin, arccos, arctan domains and graphs |
Sketch the curve $y = 2\arccos x$ for $-1 \leqslant x \leqslant 1$. [3]
\hfill \mbox{\textit{OCR MEI C3 Q8 [3]}}