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Notice how a "co- something " trig ratio is always the reciprocal of some "non-co" ratio. You can use this fact to help you keep straight that cosecant goes with sine and secant goes with cosine. The following particularly the first of the three below areed "Pythagorean" iden.ies. sin2 t + cos2 t = 1. tan2 t + 1 = sec2 t ..The tangent tan of an angle is the ratio of the sine to the cosine: Finally, the reciprocal functions secant sec , cosecant csc , and cotangent cot are the reciprocals of the cosine, sine, and tangent: These definitions are sometimes referred to as ratio iden.ies..Tangent Iden.ies. Formulas for the tangent function can be derived from similar formulas involving the sine and cosine. The sum iden.y for tangent is derived as follows: To determine the difference iden.y for tangent, use the fact that tan = tan..

Odd/Even Iden.ies. sin -x = -sin x. cos -x = cos x. tan -x = -tan x. csc -x = -csc x. sec -x = sec x. cot -x = -cot x.Tan x y = tan x tan y / 1 tan x tan y sin 2x = 2 sin x cos x. cos 2x = cos 2 x - sin 2 x = x - 1 = 1 - x tan 2x = 2 tan x / 1 - tan .Pythagorean iden.ies. Sum and difference formulas. Double angle formulas. Half angle formulas. Products as sums. Sums as products..List of tr.nometric iden.ies 1 List of tr.nometric iden.ies Cosines and sines around the unit circle In mathematics, tr.nometric iden.ies.

  • Mathwords Trig Iden Ies

    Odd/Even Iden.ies. sin -x = -sin x. cos -x = cos x. tan -x = -tan x. csc -x = -csc x. sec -x = sec x. cot -x = -cot x.

  • Tr Nometric Iden Ies Math2 Org

    Sin 2 x + cos 2 x = 1. tan 2 x + 1 = sec 2 x cot 2 x + 1 = csc 2 x sin x y = sin x cos y cos x sin y. cos x y = cos x cosy sin x sin y.

  • Tr Nometric Iden Ies Topics In Tr Nometry

    Pythagorean iden.ies. Sum and difference formulas. Double angle formulas. Half angle formulas. Products as sums. Sums as products..

  • List Of Tr Nometric Iden Ies

    List of tr.nometric iden.ies 1 List of tr.nometric iden.ies Cosines and sines around the unit circle In mathematics, tr.nometric iden.ies.

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