| Exam Board | SPS |
|---|
| Module | SPS SM Pure (SPS SM Pure) |
|---|
| Year | 2021 |
|---|
| Session | May |
|---|
| Topic | Addition & Double Angle Formulae |
|---|
4. Prove that \(\sqrt { 2 } \cos \left( 2 \theta + 45 ^ { \circ } \right) \equiv \cos ^ { 2 } \theta - 2 \sin \theta \cos \theta - \sin ^ { 2 } \theta\), where \(\theta\) is measured in degrees.
[0pt]
[BLANK PAGE]