Hi
I have a question for ya
Whats the lenght og the screen, if its 4:3 and 85" diag, ?
Full Version: Help with screen size
a^2 + b^2 = c^2
classic case is the 3:4:5 triangle
so 5 = 85"
85/5 = 17"
width (4) = 17*4 = 68"
height (3) = 17" *3 = 51"
Can't anyone do basic math anymore???
classic case is the 3:4:5 triangle
so 5 = 85"
85/5 = 17"
width (4) = 17*4 = 68"
height (3) = 17" *3 = 51"
Can't anyone do basic math anymore???
QUOTE (pagercam @ Jan 16 2006, 03:19 AM) 
a^2 + b^2 = c^2
classic case is the 3:4:5 triangle
so 5 = 85"
85/5 = 17"
width (4) = 17*4 = 68"
height (3) = 17" *3 = 51"
Can't anyone do basic math anymore???
classic case is the 3:4:5 triangle
so 5 = 85"
85/5 = 17"
width (4) = 17*4 = 68"
height (3) = 17" *3 = 51"
Can't anyone do basic math anymore???
Does your formula adjust for keystoning?
QUOTE (bevo77 @ Jan 16 2006, 10:59 AM)
Does your formula adjust for keystoning?
What does the size of the screen have to do with keystone???
Screen size has nothing to do with keystoning. You just adjust the projectors position closer or farther after adjusting. IF you want to keep the projector a certain distance from the screen, regardless of keystoning, then size would be a function of how far you want it and the degree of keystoning. Thats a bit more complicated. Solvable, but I bet thats not what you want anyways. My screen size is about 6 feet wide. Its a pull down screen so the height is adjustable.
Hey pagercam! I can do basic math! Watch this:
x = y
x^2 = xy squared both sides
x^2 - y^2 = xy - y^2 added y^2 to both sides (additive property of equality)
(x+y)(x-y) = y(x - y) factored
x + y = y divided both sides by (x - y)
Let x = 1, x = y so y = 1:
1 + 1 = 1.
2 = 1
Hey pagercam! I can do basic math! Watch this:
x = y
x^2 = xy squared both sides
x^2 - y^2 = xy - y^2 added y^2 to both sides (additive property of equality)
(x+y)(x-y) = y(x - y) factored
x + y = y divided both sides by (x - y)
Let x = 1, x = y so y = 1:
1 + 1 = 1.
2 = 1
QUOTE (pagercam @ Jan 16 2006, 02:10 PM)
What does the size of the screen have to do with keystone???
It was lame attempt at humor.
QUOTE
What does the size of the screen have to do with keystone???
QUOTE (bevo77 @ Jan 16 2006, 09:20 PM)
It was lame attempt at humor.
Why is everyone talking like rox?
QUOTE (bevo77 @ Jan 16 2006, 12:20 PM)
It was lame attempt at humor.
Its only a joke if other people get it.
QUOTE (pagercam @ Jan 16 2006, 09:37 PM)
Its only a joke if other people get it.
Yeah I can't see how thats even hypathetically a joke.
well, wana now where is your mistake mikau?
(you can talk like me but, please do not make so many mistakes...:D)
(you can talk like me but, please do not make so many mistakes...
:D)
Yeah I know where the mistake is. x = y. so x - y = 0. Towards the end we divided both sides by x-y which is zero.
Basicly we had 2*0 = 1*0 which is true, but we cancelled out the zero's to get 1 = 2. One of the many reasons division by zero is not permissable.
Basicly we had 2*0 = 1*0 which is true, but we cancelled out the zero's to get 1 = 2. One of the many reasons division by zero is not permissable.
ouch! (read as homer simpson's typical sound)
;D
;D
Here you go rox. I did this one yesterday.
Find the value of r where dA/dr = 0:
Find the value of r where dA/dr = 0:
QUOTE (Mikau @ Jan 18 2006, 08:14 AM)
Find the value of r where dA/dr = 0:
Still no answer... could someone please post an answer... this is starting to mess with my emotions
.Is it r = 4.07 ??
QUOTE (Mikau @ Jan 17 2006, 09:14 PM)
Here you go rox. I did this one yesterday.
Find the value of r where dA/dr = 0:
Find the value of r where dA/dr = 0:
ewww. Its been quite awhile since Ive had Cal, soooo ... lets just keep the derivitaves elsewhere....
LOL @ Mikau for wanting to do Calculus in his free time ......
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