Help with tangents

[CodeMonkey2000]

Ok, my version of turing doesn't seem to support tangent functions. I checked in the turing help section, and it only has sin, sind, cos, cosd. I tried using arctan() but it doesn't seem to give me the correct number (I typed in 45, and it didn't give me 1). What do I do now? Is there a way around this?

[richcash]

tan(x) = sin(x)/cos(x)

[edit]Or sind(x)/cosd(x) for degrees obviously.

[DIIST]

arctand finds the tan inverse in degrees. arctan finds the tan inverse in radians.
Try putting arctand(1), you'll get 45!

[CodeMonkey2000]

Wow, thanks guys.

EDIT: ok, now I have another problem. How do I do sin/cos/tan inverse? What I was thinking was to search for the given ratio using sin/cos/tan of 1-360. This doesn't seem very practical, is there a better way?

[Mazer]

thuvs already pointed out that arctan() is the inverse of tan(). Similarly, arccos() and arcsin() are the inverses of cos() and sin() respectively.

[CodeMonkey2000]

My version of turing only has sin, cos, tan, arctan and arctand. arccos and arcsin don't exist.

[DIIST]

Here

arcsin (x) = arctan (sqrt ((x *x) / (1 - (x *x))))
arccos (x) = arctan (sqrt ((1 - (x *x)) / (x *x)))

likewise:
arcsind (x) = arctand (sqrt ((x *x) / (1 - (x *x))))
arccosd (x) = arctand (sqrt ((1 - (x *x)) / (x *x)))

My version of turing dosnt have arcsind or arccosd either. But if you check f10 it will show you the equation for arcsin and cos. Bewary that you need to set limits on this function. For x = 0 and x= 1& -1. Another thing is to use abs, even though i didn't show it in my example you should because sqrt(-)=error