| Exam Board | OCR MEI |
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| Module | C4 (Core Mathematics 4) |
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| Topic | Addition & Double Angle Formulae |
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3 Using appropriate right-angled triangles, show that \(\tan 45 ^ { \circ } = 1\) and \(\tan 30 ^ { \circ } = \frac { 1 } { \sqrt { 3 } }\).
Hence show that \(\tan 75 ^ { \circ } = 2 + \sqrt { 3 }\).