cos() - need cosin to return in degrees not radians 1

[axtec]

I need to find the cosin of an angle, but the result is returned in radians. The problem I am trying to solve is this: Y = cos(angle) * 12. It should be really simple, but when the result of cos(angle) is in radians, the answer is not correct. If I convert the result of cos(angle) to degrees, it is incorrect as well. Using a calculator,
cos(45) * 12 is 8.48. In java, cos(45) * 12 is 6.30. Thanks.

 

[meadandale]

It is inconceivable that if you convert the result in radians to degrees that the result doesn't agree with the calculation done explicitly in degrees. I can only suspect that you are overlooking some detail of the calculation.

It turns out that you are confused about the parameter that Math.cos() takes. The argument is the angle "in radians" not in degrees. Try this

double angle = 45 * Math.PI / 180; // Convert degrees to radians
double result = Math.cos(angle) * 12; // result is 8.48

Regards,

Charles

 

[axtec]

Yep, that's it. I forgot to 'Math.toRadians(angle)' first. I knew it had to be something like that. Thanks for your help. Thanks.