😲JavaScript has a bad mistake😲

Question

These days.I make calculator ,but when I tried to use Math.sin(90) ,It hasn't been 1 .
Even cos and tan 😞but I need to use sine or cos ect.... Inside my workings, what can I do?

The wrong from JavaScript or from my phone or from me.

Although everybody knows about to
sin 90 = 1
cos 60 = 0.5
In JavaScript another thing.

Please If you have the answer tell me and If you know how can I use sin and cos into my calculator by JavaScript.

Thank you 🌹🌹🌹

Answer 1

Hi Basel Al_hangeri('MBH'). Answer to your quiestiom.
The sin function in Javascript takes radians, not degrees. You need to convert 90 to radians like this:
console.log(Math.sin(90 * Math.PI / 180.0));

Answer 2

https://www.geeksforgeeks.org/math-sin-javascript/