Smaa angle approximation

Smaw angle approximation is a wey o estimatin angles in radians, whaur the angle is smaw (less nor 3 or 4 degree).

Whan x is smaw, an in radians, the follaein formulae is true:

$\sin x\simeq x$

$\cos x\simeq 1-{\frac {x^{2}}{2}}$

$\tan x\simeq x$