inputing a formula with powers and trig functions?

[benbridle38]

Hi,

dont really know much about programming or anything like this.

But basicly in my program i am trying to write the following formula:



(linked formula as a picture to keep its format)

basicly does anyone have any ideas how i would write this?

my guess was Y=(sin((acos(x) )^(2/N)))^(2/N);
but i dont think ive done the powers right, ive read somewere that you have to use pow(i,j) for powers?

any help would be apreciated, thanks

[donbock]

Raising the arccos to a power is pretty wierd. The answer depends on whether arccos returns degrees or radians. Where did this formula come from?

[benbridle38]

reply

i got it from two formulas

x=(cos(t))2/N
y=(sin(t))2/N

and re-arranged the 1st equation, then substituted it into the second.

um it shouldnt matter wheather its in deg or rad should it?
as long as its consistant.

t is an angle, and it gets cancelled out

[benbridle38]

This is what ive come up with from the pow thing,

Y=pow(sin(pow(a cos(x), 2/N)), 2/N);

what you think? any chance that might work?

[donbock]

i got it from two formulas

x=(cos(t))2/N
y=(sin(t))2/N

and re-arranged the 1st equation, then substituted it into the second.

There are no powers (exponentiation ) here.

x = (cos(t)) * 2/N
(x*N/2) = cost(t)
t = arccos(x*N/2)

y = (sin(t)) * 2/N
y = sin(arccos(x*N/2)) * 2/N

Your starting point is the canonical parametric equation representation of a circle. Are you sure converting to function form is helpful?