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# \$cos

Calculates the cosine of a number.

\$cos(number)

### Parameters

 number a number, or an expression that evaluates to a number

### Return Value

Number, with the same number of decimal places as number.

### Comments

The value returned by this function has the same number of decimal places as number. Ensure that you specify enough decimal places in your equation to ensure a sufficiently granular result. Unusual results such as
-0 are an indication that the number of decimal places needs to be increased. For example, if you enter

\$cos(2)

without any decimal points, you receive the result

-0

However, if you enter

\$cos(2.0000)

you receive the result

-0.4161

### Example

\$cos(0)

Evaluates to 1.

let var1 = 3.14
let var2 = \$cos(0.50*var1)

Var2 evaluates to 0.00.

See Also

\$acos

\$cosh

\$sin

\$tan

About Functional Expressions

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