Математические знаки на английском языке
+ plus
- minus
± plus or minus
= is equal to, equals
≠ does not equal
≡ identical, identically equal to
~ equivalent, similar (is similar to)
> is greater than
< is less than
→ approaches
∞ varies as, is propotional to
∞ infinity
ab a times b; a multiplied by b
a/b the ratio of a to b; a divided by b
proportion: a is to b as с is to d
an the n-th power of a; aaa... to n factors
√ radical sign
√a square root of a
a-n the reciprocal of an; 1/an
log a common logarithm of a
log10 a logarithm of a to the base 10
ln a natural logarithm of a
F(x), f(x) function of x
y = f(x) у is a function of x
dy/dx, df(x)/dx the derivative of у with respect to x
d2y/dx2 the second derivative of у with respect to x
a' [ei] prime, dash
a" [ei] second, double prime, double dashed
an [ei] sub n, subscribed n
∫ integral sign
∫∫ double integral
( ) parentheses
[ ] brackets
{ } braces
LCM (lcm) least common multiple
GCD (gcd) greatest common divisor
∠ angle
∟ right angle
⊥ perpendicular (is perpendicular to)
| | parallel (is parallel to)
Δ triangle
▱ parallelogram
□ square
○ circle
∩ arc; А∩В (arc AB)
° degrees (of arc or angle)
' minutes of arc or angle; foot, feet
" seconds (of arc or angle); inches
sin A — sine of A
cos A — cosine of A
tan A — tangent of A
cot A (or ctn A) — cotangent of A
sec A — secant of A
cosec A (or esc A) — cosecant of A