Zodiac 30° along the ecliptic is nominally designated as the zodiac sign Aries, which no longer falls within the proximity of the constellation Aries since the effect of precession is to move the vernal point through the backdrop of visible constellations (it is currently located near the end of the constellation Pisces, having been within that constellation since the 2nd century AD). The subsequent 30° of the ecliptic is nominally designated the zodiac sign Taurus, and so on through the twelve signs of the zodiac so that each occupies 1/12th (30°) of the zodiac's great circle. Zodiac signs have never been
Plus-minus sign be rewritten as ""x" ± ("y" − "z")" to avoid confusion, but cases such as the trigonometric identity are most neatly written using the "∓" sign. The trigonometric equation above thus represents the two equations: but "not" because the signs are exclusively alternating. Another example is which represents two equations. The plus-minus sign resembles the Chinese characters and , whereas the minus-plus sign resembles . Plus-minus sign The plus-minus sign (±) is a mathematical symbol with multiple meanings. The sign is normally pronounced "plus or minus" or "plus-minus". A version of the sign, including also the French word "ou" ("or")