Assertion: antenna's aperture | /r/HasProperty | large
Facets:
value: the angle θ
type: OTHER
Source sentences:
text: When the aperture is large the angle θ 0 {\displaystyle \theta _{0}} is very small, so arcsin ⁡ ( x ) {\displaystyle \arcsin(x)} is approximataly equal to x {\displaystyle x} .