Pure maths ch9 - Study guides, Class notes & Summaries
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PURE MATHS CH9 VERIFIED 100% SOLUTIONS
- Exam (elaborations) • 16 pages • 2023
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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)
Exam (elaborations)
PURE MATHS CH9 VERIFIED 100% SOLUTIONS
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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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