PURE MATHS CH9 VERIFIED 100% SOLUTIONS
PURE MATHS CH9 VERIFIED 100% SOLUTIONS cosine rule (2) a² = b²+c²-2bcCosA CosA = (b²+c²-a²)/2bc Use trigonometric ratios for right angled triangles to prove the cosine rule the largest angle is always opposite the ... (2) largest side (and vice versa)
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- 14 augustus 2023
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