Exam (elaborations)
Edexcel A Level Maths – Pure 2023 With Verified and Elaborated Questions
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Edexcel A Level Maths – Pure 2023 With Verified and Elaborated Questions Cosine Rule - Know 2 sides, and the angle in between. You want the missing side. Correct Answer a² = b² + c² - 2bcCosA Cosine Rule - Know 3 sides. You want an angle. Correct Answer Cos A = (b² + c² - a²) ÷ 2bc ...
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