| Exam Board | OCR MEI |
|---|
| Module | C2 (Core Mathematics 2) |
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| Topic | Trig Proofs |
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7
- Using the triangle, show that \(\sin ^ { 2 } x + \cos ^ { 2 } x = 1\).
- Hence prove that
\includegraphics[max width=\textwidth, alt={}]{73d1c02b-1b7b-426d-a171-c762597cfed4-2_255_501_1779_1022} \(1 + \tan ^ { 2 } x = \frac { 1 } { \cos ^ { 2 } x }\).