A-Level Maths: E6-04 Compound Angles: Introducing the Double Angle Formulae

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"dont not learn it" i love phrases like these

hardtruth
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hai, I'm from Malaysia, thank you for making this video. It was really helpful

puterinurwardyina
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would you reccomend the double angle formulae over the t formulae? Because ive learnt both methods but its hard to know which one i should use most of the time especially for integrating polar curves for example

ELLIPTICALWR