As Vazões de Dimensionamento

Tabela de Identidades Trigonométricas

Prof. MSc Henrique Starick

1. sen2x + cos2x = 1

1. sen2x = 1 - cos2

1. cos2x = 1 - sen2x

1. tgx = senx 

               cosx

1. tgx . cosx = senx

1. cosx = senx

                  tgx

1. cotgx = cosx

                   senx

1. cotgx.senx = cosx

1. senx = cosx

                  cotgx

1. secx =   1[pic 1]

                cosx

1. secx . cosx = 1

1. cosx =    1

                  secx[pic 2]

1. cosecx = 1

                  senx[pic 3]

1. cosecx . senx = 1

1. senx =     1

                 cosecx[pic 4]

1.  sec2x =   1[pic 5]

                cos2x

1. sec2x . cos2x = 1

1. cosec2x = 1

                  sen2x[pic 6]

1. cosec2x.sen2x = 1

1.  sec2x = 1 + tg2x

1. sec2x - tg2x = 1

1. cosec2x = 1 + cotg2x

1. cosec2x - cotg2x = 1

1. sen2x = 1 – cos2x

                               2

1. cos2x = 1 + cos2x

                               2

1. sen2x = 2senx.cosx

1. sen (-x) = -sen x 

1. cos (-x) = cos x

1. cos2x = cos2x – sen2x

1. cos2x = cos2x + sen2x

1. cos2x = 1 - 2 sen2x

1. cos2x = 2 cos2x – 1

1. tg x  =    senx[pic 7]

          2    1+ cos x[pic 8]

1.  tg (-x) = -tg x

[pic 9][pic 10]

[pic 11][pic 12]

37-cos( a + b)= cosa.cosb – sena.senb

38-sen(a – b) = sena.cosb – senb.cos a

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