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Harris Amjad

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

The ** acos() function** calculates the inverse cosine of a number. To be more specific, it returns the inverse cosine of a number in radians. It is also called the

`arc cosine`

functionFigure 1 shows the *mathematical* representation of the `acos()`

function and Figure 2 shows the *visual* representation of the `acos()`

function.

This function is present in the

`Math`

module.

To convert `radians`

to `degrees`

, use the following formula.

```
degrees = radians * ( 180.0 / pi )
```

```
acos(num)
```

This function requires a number as a parameter. The parameter must be a double value between -1 and 1, i.e., `-1 <= parameter <= 1`

.

This function returns the `inverse cosine`

of a number (in radians) that is set as a parameter. The return value lies in the interval of `[0, pi]`

radians.

#positive number in radiansprint "The value of acos(0.5) : ", Math.acos(0.5), " Radians \n"#negative number in radiansprint "The value of acos(-0.5) : ", Math.acos(-0.5), " Radians \n"#applying acos() and then converting the result in radians to degrees#radians = 0.5#PI = 3.14159265result = Math.acos(0.5) * (180.0 / Math::PI)print "The value of acos(0.5) : ", result, " Degrees"

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Harris Amjad

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

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