😲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

You have to provide the parameter in radians, not degrees. Try: Math.sin(Math.PI)

Answer 2

Yes, I would try (Math.PI/2.0) for 90 and (Math.PI/3.0) for 60.

Answer 3

You need to convert the arguments to radians.

Answer 4

You won't get answer until deleting other 3 same questions.

Answer 5

Good.