| Exam Board | Edexcel |
|---|---|
| Module | C2 (Core Mathematics 2) |
| Marks | 8 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Standard trigonometric equations |
| Type | Multiple independent equations — all direct solve |
| Difficulty | Moderate -0.8 This is a straightforward trigonometric equation question testing basic solving techniques. Part (a) requires simple rearrangement and understanding of when cosine equals zero. Part (b) involves using inverse sine and finding multiple solutions in the given interval, which is standard C2 material requiring only routine application of calculator and CAST diagram knowledge with no problem-solving insight needed. |
| Spec | 1.05o Trigonometric equations: solve in given intervals |
Find all values of θ in the interval 0 ≤ θ < 360 for which
\begin{enumerate}[label=(\alph*)]
\item cos (θ + 75)° = 0. [3]
\item sin 2θ° = 0.7, giving your answers to one decimal place. [5]
\end{enumerate}
\hfill \mbox{\textit{Edexcel C2 Q5 [8]}}