SIN and COS functions have bug ?

[papa_robot]

Hello to the zx basic community. I'm integrating the compiler into my own spectrum bot.

I created a sample sinewave graph

Code:

FOR x = 10 TO 245 STEP 2
  PLOT x,100+SIN(2*x*PI/180)*50
NEXT x

However I see the values jump around 90 deg, see video here

https://twitter.com/ZxSpectrumBot1/statu...twCv438ECA

I cannot find any reference in the doc , it is supposed to be sinclair compatible, but in sinclair basic it works ok

https://twitter.com/ZxSpectrumBot1/statu...twCv438ECA

thanks a lot

[papa_robot]

nevermind, declared x as float
dim x

[boriel]

nevermind, declared x as float
dim x

Glad to see you catch it!