EntityQ7841831· pop 9· linked from 79 articlestrigonometric numberSign in to saveirrational number produced by taking the sine or cosine of a rational multiple of a full circleConnectionsCarl Friedrich GaussEntityLeonhard EulerEntityPiConceptInternational Standard Book NumberEntitytrigonometryEntitycomplex numberEntityPythagorean theoremEntityPtolemyEntityJoseph FourierEntityreal numberEntityrational numberEntityBrahmaguptaEntitycalculusEntitydigital object identifierEntityInternational Standard Serial NumberEntityexponentiationEntitysquare rootEntitygolden ratioEntityirrational numberEntityEuler's numberEntityCategoriesAlgebraic numbersIrrational numbersTrigonometry