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trigonometry, the branch of mathematics concerned with specific functions of an angle commonly used in trigonometry. their names and abbreviation are sine sin, cosine cos tangent tan contangent cot secant sec and cosecant csc
trigonometry, the branch of mathematics concerned with specific functions of an angle commonly used in trigonometry. their names and abbreviation are sine sin, cosine cos tangent tan contangent cot secant sec and cosecant csc
