| Exam Board | OCR MEI |
|---|---|
| Module | C2 (Core Mathematics 2) |
| Year | 2009 |
| Session | June |
| Marks | 2 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Trigonometric equations in context |
| Type | Exact value from special triangle |
| Difficulty | Easy -1.8 This is a straightforward geometric demonstration requiring only basic Pythagoras and trigonometry definitions. Students draw a standard 45-45-90 triangle with sides 1:1:√2 and read off the ratio—it's essentially a recall exercise with minimal problem-solving, significantly easier than average A-level questions. |
| Spec | 1.02b Surds: manipulation and rationalising denominators1.05g Exact trigonometric values: for standard angles |
1 Use an isosceles right-angled triangle to show that $\cos 45 ^ { \circ } = \frac { 1 } { \sqrt { 2 } }$.
\hfill \mbox{\textit{OCR MEI C2 2009 Q1 [2]}}