Flashcards
Trigonometric identities
Cards in this deck (45)
- 1Reciprocal identitiesReciprocal
- 2Sin X=1 / csc X
- 3Cos X=1 / sec X
- 4tan X=1 / cot x
- 5csc x=1 / sin x
- 6sec x=1 / cos x
- 7cot x=1 / tan x
- 8Quotient identitiesQuotient
- 9Tan x=sin x / cos x
- 10cot x=cos x / sin x
- 11Pythagorean IdentitiesPythagorean
- 12sin^2 x + cox^2 x=1
- 13tan^2 x + 1 =sec^2 x
- 141 + cot^2 x=csc^2 x
- 15Double Angle identitiesDouble angle
- 16sin (2x)=2 sin x cos x
- 17cos (2x)=cox^2 x - sin^2 x
- 18cos (2x) =2 cos^2 x -1
- 19cos (2x)=1 - 2 sin^2 x
- 20tan (2x)=2 tan x / 1- tan^2 x
- 21Power reducing identitiesPower reducing
- 22sin^2 x=1- cos (2x) / 2
- 23cos ^2 x=1 + cos (2x) / 2
- 24tan ^2 x =1 - cos (2x) / 1 + cos (2x)
- 25ODdIdentities
- 26sin (-x) =- sin x
- 27tan (-x) =- tan x
- 28csc (-x) =-csc x
- 29cot (-x) =- cot x
- 30Evenidentities
- 31cos (-x) =cos x
- 32sec (-x)=sec x
- 33Cofunction identitiescofunction
- 34sin ( pi / 2 - x) =cos x
- 35cos ( pi/ 2 - x)=sin x
- 36tan ( pi/2 - x) =cot x
- 37csc (pi / 2 -x )=sec x
- 38sec (pi / 2 - x)=csc x
- 39cot (pi / 2 -x)=tan x
- 40Sum identitiesSum
- 41sin (x + y) =sin x cos y + sin y cos x
- 42cos (x + y ) =cos x cos y - sin x sin y
- 43Difference IdentitiesDifference
- 44sin (x - y ) =sin x cos y - sin y cos x
- 45cos (x - y) =cos x cos y + sin x sin y