+

Plus (sign of addition)

?

Pi (3.1416)

+

Positive

?

Sigma (sign of summation)

?

Minus (sign of subtraction)

?

Omega (angles measured in radians)

?

Negative

g

Acceleration due to gravity (32.16 ft. per sec. per sec.)

( )

Plus or minus (minus or plus)

i (or j)

Imaginary quantity ( )

Multiplied by (multiplication sign)

sin

Sine

Multiplied by (multiplication sign)

cos

Cosine

Divided by (division sign)

tan

Tangent

/

Divided by (division sign)

cot

Cotangent

:

Is to (in proportion)

sec

Secant

=

Equals

csc

Cosecant

?

Is not equal to

vers

Versed sine

?

Is identical to

covers

Coversed sine

::

Equals (in proportion)

sin ^?1 a arcsin a

Arc the sine of which is a

Approximately equals

(sin a) ^?1

Reciprocal of sin a (1 sin a)

?

sin ⁿ x

nth power of sin x

>

Greater than

sinh x

Hyperbolic sine of x

<

Less than

cosh x

Hyperbolic cosine of x

?

Greater than or equal to

?

Delta (increment of)

?

Less than or equal to

?

Delta (variation of)

?

Approaches as a limit

d

Differential (in calculus)

?

Varies directly as

?

Partial differentiation (in calculus)

?

Therefore

?

Integral (in calculus)

Square root

Integral between the limits a and b

Cube root

!

5! = 1 2 ...