A-Level Maths Edexcel Trigonometry (7) - L17 - Core 3 Edexcel Maths A-Level

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at 14:40 isn't obtuse between 90 and 180, you highlighted 180-270? Even though it gets you the same answer..

davidpetrosyan
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sin 90 is 1 lol and you teach Further Maths lmao.Any way thanks for the videos

nafisbitw
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"sin 90 u know is 0" good maths there.

张鹏飞-wv