# Identities Cot

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Cofunction Iden.ies, radians Cofunction Iden.ies, degrees. sin 90 - x = cos x. cos 90 - x = sin x. tan 90 - x = cot x, cot 90 - x = tan x. sec 90 - x = csc x, csc 90 - x = sec x .

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.Pythagorean iden.ies. Sum and difference formulas. Double angle formulas. Half angle formulas. Products as sums. Sums as products..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 functions, iden.ies, formulas and the sine and cosine laws are presented..

• ### Mathwords Trig Iden Ies

Trig Iden.ies. Iden.ies involving trig functions are listed below. Pythagorean Iden.ies. sin 2 + cos 2 = 1. tan 2 + 1 = sec 2 cot -x = -cot x .

• ### Tr Nometric Iden Ies Maths Resources

The Tr.nometric Iden.ies are equations that are true for Right Angled Triangles. If it is not a Right Angled Triangle go to the Triangle cot 2 + 1 = csc 2 .

• ### List Of Tr Nometric Iden Ies Wikipedia

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..

• ### Tr Nometric Iden Ies Purplemath

Tan x =1cot x =sin x cos x an x = \dfrac{1}{\cot x } = \dfrac{\sin x }{\cos x }tan x =cot x 1=cos x sin x . Notice how a "co- something " trig ratio is always the reciprocal of some "non-co" ratio. .

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