Remember ALL the double angle formulas in secs! | (sin 2θ, cos 2θ, tan 2θ)
Автор: Fast and Easy Maths !
Загружено: 2018-01-26
Просмотров: 79993
Hi, as a teacher I have often come across students finding it difficult to remember the double angle formulas for sin, cos and tan; in this video I have explained the easiest way to get all these formulas from just two formulas.
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