Triangle The acronym "SOH-CAH-TOA" is a useful mnemonic for these ratios. The inverse trigonometric functions can be used to calculate the internal angles for a right angled triangle with the length of any two sides. Arcsin can be used to calculate an angle from the length of the opposite side and the length of the hypotenuse. Arccos can be used to calculate an angle from the length of the adjacent side and the length of the hypotenuse. Arctan can be used to calculate an angle from the length of the opposite side and the length of the adjacent side. In introductory
St Michael and All Angels Church, Southwick is shaped like a right-angled triangle whose longest side runs from north to south. Shoreham Harbour and the English Channel form the southern boundary; the eastern side corresponds with the ancient boundary between the Rapes of Bramber and Lewes (now the boundary between Adur district and the city of Brighton and Hove, and also between West Sussex and East Sussex); and the western boundary was created in 1848 when Kingston Lane was built to form the eastern limit of Kingston Buci parish. Until 2008, there were two other active Anglican churches in the parish, both of which were administered from