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0

(x^8) -1

since 8 can be divide by two
8 / 2 = 4

definition of sum and difference
a^2 - b^2 = (a - b)(a + b)

we get,
((x^4) - 1)((x^4) + 1)

since 4 can be divide by two
4 / 2 = 2

((x^4) + 1)((x^2) + 1)((x^2) - 1)

since 2 can be divide by two
2 / 2 = 1

((x^4) + 1)((x^2) + 1)(x - 1)(x + 1)

GuestMay 11, 2012

0

Given: csc^2(x) + cot(x) = 7

csc^2(x) = cot^2(x) + 1

cot^2(x) + 1 + cot(x) = 7
cot^2(x) + cot(x) - 6 = 0

Let cot(x) = a
a^2 + a - 6 = 0
(a + 3)(a - 2) = 0
a = -3
a = 2

but a = cot(x)

cot(x) = -3
x = 341.57deg

cot(x) = 2
x = 26.57deg

Steub

GuestMay 11, 2012

May 10, 2012

0

(X^8)-1 =((x^4)^2)-1^2=[((x^2)^2) -1^2][(x^4)+1]
=[(x^2)-1^2][(x^2)+1][(x^4)+1]
=[x-1][x+1][(x^2)+1][(x^4)+1]

GuestMay 10, 2012

0

GuestMay 10, 2012

0

A rational number is any number that can be written as a ratio (fraction) of a/b

3 is rational since it can be3/1
.66666666 repeating is since it is 2/3
pi (3.141592....) is not since it has no fractional equivalent

I hope this helps!

GuestMay 10, 2012

+3146

0

[input]40= 60- 2400*(1/x+100)[/input]

adminMay 10, 2012

0

the answer is x=7 so 1/7

GuestMay 10, 2012

May 9, 2012

+8

0

Thanks for the help.

MalikXJacksonMay 9, 2012

+8

0

What is the equation?

MalikXJacksonMay 9, 2012

+3146

0

adminMay 9, 2012

May 8, 2012

0

GuestMay 8, 2012

0

So they are the same, thank you.

GuestMay 8, 2012

+3146

0

[input]1nF in F[/input]
[input]0.000000005F[/input]

adminMay 8, 2012

0

You can solve this without a calculator by turning both numbers into improper fractions. 1 3/8 turns into 11/8 and 3 turns into 24/8

(24/8)-(11/8)=13/8
or
1 and 5/8

GuestMay 8, 2012

0

Here I would use a system of equations. Write out what you know.
Let's use x as the smaller angle and y as the larger one.

x+28=y
x+y=90

We can rearrange the first equation like this
x-y=-28

Now we can add the two equations to get this

2x=62

Divide both sides by two

x=31 degrees

That means the other angle must be 59 degrees.
Is this the answer we're looking for? 59-31=28 if I am correct in my subtraction.

So we get the answers 31 and 59 by using systems of equations.
I hope I helped

GuestMay 8, 2012

0

I was wondering this too. Thanks.

GuestMay 8, 2012

0

Mine was: Some old hippy caught another hippy trippin' on acid

GuestMay 8, 2012

May 7, 2012

0

soh= opposite/hypotenuse
Cah= Adjacent/Hypotenuse
Toa= Opposite / adjacent

I always remembered it: Some old hags cant always hide their old age. hope i helped

GuestMay 7, 2012

0

1.) wie alt bist du eigentlich um nicht erkennen zu können wie sinnlos diese frage ist?
2.) 299

GuestMay 7, 2012

+8

0

hei,everbody know what 2+2 is.

Streberin in matheMay 7, 2012

+8

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your sooooo stupid,because you can resolv alone this thing...

Streberin in matheMay 7, 2012

+3146

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[input]f(x) = 30.7 + 1.4log (x + 1); f(688)[/input]

adminMay 7, 2012

0

GuestMay 7, 2012

+2

0

you have to write "sqrt(" in front of your term, for example [input]sqrt(4)[/input]
if you want to write the 3rd, 4th, 5th, ...root of a term, you have to write "sqrt(16, 4)" (the result is 2) [input]sqrt(16 ,4)[/input]

I hope I could help you.

NovakovicFanMay 7, 2012

0

hooo:
Just for your infomation, probability isn't mesured in fractions. So a get a better math teacher!
Love,
ME

GuestMay 7, 2012

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