When the angle involved is odd, we usually use addition formula (just like in this question).
News, stories and discussion from and about the world of formula 1. Other trignometric identities reect a much less obvious property of the cosine and sine functions, their behavior under addition of angles. Learn vocabulary, terms and more with flashcards, games and other study tools. This package is ideal for those who want to take formulas to the next level.
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