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melon
Fishleader

Registered: Jul 2000
Location: salmon city
Posts: 1412
Post math question:

if cos(x) = M

then: sin(2x) = ?

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Old Post 03-13-2001 04:06 PM
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Pianomahnn
Sw0ul3!!!!!11

Registered: Feb 2001
Location: Chicago, IL
Posts: 2704
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Whipping out my phat TI-89 right now....

....calculating....

I've been pushing buttons left and right, and cant find a damn answer.

Hmmmm....I am now reverting back to hand written math...

sin(2x)=2sin(x) cos(x)
We know cos(x) = M
sin(2x)=2sin(x)(M)

Uh, I can't think of where to go from here. I may get back to this later.

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Old Post 03-14-2001 07:18 AM
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Dacarlo
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Registered: Oct 2000
Location:
Posts: 15481
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quote:
Originally posted by melon:
if cos(x) = M

then: sin(2x) = ?




if sin = 2x and x=M then

2x=2M

It's been many years but that seems to make sense. Does anyone use this in real life?

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Old Post 03-19-2001 04:41 PM
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Pianomahnn
Sw0ul3!!!!!11

Registered: Feb 2001
Location: Chicago, IL
Posts: 2704
Post

quote:
Originally posted by Dacarlo:
if sin = 2x and x=M then

2x=2M



I don't think so. x does not equal M. cos(x)=M.

There is a difference. And IMHO , I don't see the validity of your answer.

Now, I must totally solve this one....


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Live In Freedom

In retrospect, I probably should have taken the vanilla icecream. But the chocolate looked far too tempting. Little did I know at the time, it was actually little children all mushed up into a fine icey paste. Needless to say, I didn't sleep well that night, and neither did those kiddies. Well, I didn't stand for such a crime!! NO WAY. I marched back in that store and demamded an explanation. And there is was. Double chocolate icecream. Sitting there, waiting to be ingested. Oh, the taste. Oh the pure orgasmic feeling when you consume the delicious cream. Oh, how I love chocolate icecream.

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Old Post 03-19-2001 09:33 PM
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GoFuckYourselves!
#1 Asylum Dumbfuck!

Registered: Oct 2000
Location: Dumbfucksville!
Posts: 17714
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quote:
Originally posted by melon:
if cos(x) = M

then: sin(2x) = ?



That's so damned easy!!

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Old Post 03-26-2001 04:19 AM
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ike
= ike

Registered: Mar 2001
Location:
Posts: 237
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quote:
Originally posted by melon:
if cos(x) = M

then: sin(2x) = ?




Correct me if I'm wrong but...
if cos(x) = M
x = arccos(m)
then sin(2(arccos(M)))
=2sin(arccos(M))cos(arccos(M))
=2sin(arccos(M))

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Old Post 03-31-2001 10:25 PM
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