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CSS Function - acos()
The CSS function acos() is a trigonometric operation that calculates the inverse cosine of a value in the range -1 and 1.
This function performs a single calculation and returns the number of radians that represent <angle> between 0 deg and 180 deg.
Possible values
The acos(number) function allows only a single value as a parameter.
number - The calculation returns a <number> in the range -1 to 1.
Return Value
The inverse cosine of a number always returns an <angle> in the range of 0 to 180.
If the number is less than -1 or greater than 1, the result is NaN.
If the number is exactly 1, the result is 0.
Syntax
acos( <calc-sum> )
CSS acos() - Rotate Element
The acos() function can be employed to rotate elements as it yields an <angle>. The following example demonstrates the use of acos().
<html> <head> <style> div.box { width: 100px; height: 100px; background-color: lightgreen; text-align:center; font-size:30px; } div.boxA { transform: rotate(asin(1)); margin-bottom: 20px; margin-left:20px; } div.boxB { transform: rotate(acos(0.5)); margin-bottom: 20px; margin-left:20px; } div.boxC { transform: rotate(acos(0)); margin-bottom: 20px; margin-left:20px; } div.boxD { transform: rotate(acos(-0.5)); margin-bottom: 20px; margin-left:20px; } div.boxE { transform: rotate(acos(-1)); margin-bottom: 20px; margin-left:20px; } </style> </head> <body> <div class="box boxA">A</div> <div class="box boxB">B</div> <div class="box boxC">C</div> <div class="box boxD">D</div> <div class="box boxE">E</div> </body> </html> Advertisements