Proof of Angle: Cosine Rule, Hexagon & Congruent Parallelograms (GCSE Maths June 2017 Paper 1 Q22)

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Комментарии
Автор

Where did the -200 go in the last steps? How it became 1-cos

george
Автор

Why did we assume AC and PQ are equal?.. They haven't said that the 2 xs in the first triangle are equal to 10 as well

malakmutasim