How actually as3 math.sin works? is function same with scientific calculator ?

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hello everyone

how actually math.sin() works in as3??
i'm confuse with the result i got

i try to trace(math.sin( 180 ))

in reality i should be 0,
but i got -0.8011526357338304

and i also try trace(math.sin(90))
it should be 1
but i got 0.8939966636005579

and some of the value was negative ( as what i understand about calcuation of sine , value in between 0 - 179 should be postive )

can someone pls correct my mistake ?

What I have tried:

i have try this code

trace(math.sin(180))
result was -0.8011526357338304

and other value was incorrect besides math.sin(0)

Posted 5-Feb-16 2:15am

newbie1992

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CPallini · Accepted Answer · 2016-02-05T02:59:00

Solution 1

You get such a result because the sin method argument is supposed to be given in radians[^] while you are using degrees.
Try, for instance

as

trace( Math.sin( degrees * Math.PI / 180 ))

See: "Math - Adobe ActionScript 3(AS3) API Reference"[^].

Posted 5-Feb-16 2:59am

CPallini

Updated 5-Feb-16 3:10am

v2

Comments

Sergey Alexandrovich Kryukov 5-Feb-16 14:41pm

My 5. It's amazing that the inquirer assumed degrees without even a doubt.
—SA