If you come from Visa-waiver countries, you don't need a visa to enter New Zealand, but are still required to provide: 1  Travel tickets or evidence of onward travel arrangements.2  Evidence that you can support yourself in New Zealand (approximately NZ$1000 per month per person).hen you arrive in New Zealand, youâll need to be carrying a passport that is valid for at least three months beyond your intended departure date. Many people will qualify for visa-free entry, but depending on your country of origin, some will need to apply for a visa before they travel.
arctan - the inverse function of the tangent; the angle that has a tangent equal to a given number. arc tangent, arctangent, inverse tangent. circular function, trigonometric function - function of an angle expressed as a ratio of the length of the sides of right-angled triangle containing the angle.
The arctangent is the inverse tangent function. Since. tan Ï/4 = tan 45Âº = 1. The arctangent of 1 is equal to the inverse tangent function of 1, which is equal to Ï/4 radians or 45 degrees: arctan 1 = tan-1 1 = Ï/4 rad = 45Âº. Arctan.