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Trigonometry Formulas Involving Triple Angle Identities.
sin3A = 3sinA–4sin3A = 4sin(60∘−A).sinA.sin(60∘+A)
cos3A = 4cos3A–3cosA = 4cos(60∘−A).cosA.cos(60∘+A)
tan3A = 3tanA–tan3A / 1−3tan2A = tan(60∘−A).tanA.tan(60∘+A)
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Math Formula
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- B Butts
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