Tutorial Services – Mission del Paso Campus

← Back to document page

Trigonometric identities & Formulas Tutorial Services Mission del Paso Campus Reciprocal identities Ratio or Quotient identities 1 1 sin x cos x sin x csc x tan x cot x . csc x sin x cos x sin x 1 1. cos x sec x sinx = cosx tanx cosx = sinx cotx sec x cos x 1 1. tan x cot x . cot x tan x Pythagorean identities Pythagorean identities in Radical Form sin x cos x 1. 2 2. sin x 1 cos2 x 1 tan 2 x sec2 x 1 cot 2 x csc2 x tan x sec 2 x 1. Note: there are only three, basic Pythagorean identities , the other forms cos x 1 sin 2 x are the same three identities , just arranged in a different order. Confunction identities Odd-Even identities Also called negative angle identities . sin x cos x cos x sin x Sin (-x) = -sin x Csc (-x) = -csc x 2 2 . Cos (-x) = cos x Sec (-x) = sec x . tan x cot x cot x tan x Tan (-x) = -tan x Cot (-x) = -cot x 2 2.

Saved C: Trigonometry Formulas {Web Page} microsoftword & PDF Website: www.mathgraphs.com 5 Double Angle Identities Half Angle Identities Power Reducing Formulas sin sin cos22A A …

  Services, Glean, Tutorials, Half, Double, Tutorial services, Identities, Double angle identities half angle identities