| Exam Board | AQA |
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| Module | C2 (Core Mathematics 2) |
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| Year | 2015 |
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| Session | June |
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| Topic | Trig Equations |
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6
- Solve the equation \(\sin ( x + 0.7 ) = 0.6\) in the interval \(- \pi < x < \pi\), giving your answers in radians to two significant figures.
- It is given that \(5 \cos ^ { 2 } \theta - \cos \theta = \sin ^ { 2 } \theta\).
- By forming and solving a suitable quadratic equation, find the possible values of \(\cos \theta\).
- Hence show that a possible value of \(\tan \theta\) is \(2 \sqrt { 2 }\).