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trig math question
November 25, 2002 01:01 PM
i know to use sine and cosine to calculate a point on a circle
with a given radius, but i was wondering if anyone knew a formula that takes a line and returns it''s angle relative to an axis like the x axis?
1,099
November 25, 2002 06:13 PM
In taking a peak at the math library... i don''t see an inverse sin function!
how rude!
This makes things a bit more difficult for you... anyone have the inverse sin formula?
how rude!
This makes things a bit more difficult for you... anyone have the inverse sin formula?
469
November 25, 2002 06:18 PM
asin(), acos(), atan(), atan2()
That is, arcsin, arccos, and arctan, which are the inverse functions, just using their ''proper'' mathematical names.
That is, arcsin, arccos, and arctan, which are the inverse functions, just using their ''proper'' mathematical names.
556
November 25, 2002 06:20 PM
quote:
Original post by C-Junkie
In taking a peak at the math library... i don''t see an inverse sin function!
how rude!
This makes things a bit more difficult for you... anyone have the inverse sin formula?
it''s called arc sin or asin() and asinl() as the long version. they''re both defined in math.h
Crispy
"Literally, it means that Bob is everything you can think of, but not dead; i.e., Bob is a purple-spotted, yellow-striped bumblebee/dragon/pterodactyl hybrid with a voracious addiction to Twix candy bars, but not dead."- kSquared
340
November 25, 2002 06:39 PM
Dont forget to reduce to a unit vector (radius of 1).
"Free advice is seldom cheap."
-- Rule of Acquisition #59
"Free advice is seldom cheap."
-- Rule of Acquisition #59
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