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trignometry
- Thread starter bala08ap
- Start date
find the value for arctan2(sqrt(a),sqart(1-a))
Please explain what arctan2 means. Is it supposed to be arctan2 ?
Also, why does the function input contain a comma? :-?
HallsofIvy
Elite Member
- Joined
- Jan 27, 2012
- Messages
- 7,763
bala08ap still needs to confirm this but I believe that "arctan2(x, y)" is commonly used, in the computer languages C++ and Java, to mean "arctangent of y/x". That is, "y" is the "opposite side" and "x" is the "near side" of a right triangle having angle "arctan2(x, y)".
bala08ap still needs to confirm this but I believe that "arctan2(x, y)" is commonly used, in the computer languages C++ and Java, to mean "arctangent of y/x". That is, "y" is the "opposite side" and "x" is the "near side" of a right triangle having angle "arctan2(x, y)".
Although it is more a spreadsheet use, I have seen "arctan2(x, y)" mean "arctangent of x/y" although I believe it may have been atan2 instead of arctan2.
Oh, and, for both versions, in addition it gives the proper quadrant in (-\(\displaystyle \pi,\space\pi\)] (although it could have been that the open and closed ends were swapped).