need help with algebra2 :]

[LAGUNA]

Hell, while we are asking for help with math...

anti-derivative of cos^2(x) dx

Driving me crazy

{[Sin(x)+Cos(x)]/2} + (x/2)

edit: +C

[Almaa]

take-home test >_________>
(class is flunking pretty bad teacher felt sorry orz)

apparently the fact that it's a take home test isn't helping you out much

[LAGUNA]

lol sorry algebra isnt my forte
why im studying for finals :/


16^2/3
_______ over
32^1/2

= 2^(1/6)

[LAGUNA]

ty again

Use a calculator.

1st one, try (12+x) (16+x) = the area, which was 376 or something. then Solve for x.

my friend said it should be 2x since theres 2 sides to the border thing

but i still ended up with:
(12+2x)(16+2x)=376
192 + 24x + 32x + 4x^2 = 376
4x^2 + 56x + 192 = 376
4^2 + 56x - 184 = 0
4(x^2 + 16x - 46) = 0

yeah.. i also tried it this way..

(12+2x)(16+2x)=376
192 + 24x + 32x + 4x^2 = 376
4x^2 + 56x + 192 = 376
4x^2 + 56x = 184
4x(x+14) = 184
x = 46/x - x

is there like a math forum somewhere so i stop bothering bg forums?

I'm going to agree with your friend about the 2x. But after you solve it to the first thing you did, divide out the 4 so you just have the quadratic equation. From there do the quadratic formula or factor it.

Correct
X = 95^(1/2) - 7 or -(95^(1/2) + 7 )
or
X= 2.7468 Or -16.7468

Of course it will be the positive one.

[LAGUNA]

I'm in the mood to do more math problems since im studying for my math final, just throw anything at me

[Parshias]

Then what's seventy-twelve plus a googleplex to the power of apple pie?

[Chumbelina]

http://img338.imageshack.us/img338/7...ing00018dh.jpg

I knew this comic was inspired by something familiar.
This must be untouchable and his friend in math class lol

[synistar]

Rewrite cos^2(x)dx as dx/sec^2(x) which you integrate to -ln(csc^2(x)) + C.

Yep I'm really bored at work

[Gafgarionn]

I'm taking Calculus right now, and we just got to natural logs. Pretty tuff stuff...

[untouchable]

http://img338.imageshack.us/img338/7...ing00018dh.jpg

I knew this comic was inspired by something familiar.
This must be untouchable and his friend in math class lol

lmao

sad part is im a soph in a junior class, and im not the dumbest one in the class

[Fayth-]

May not be from the same comic line, but still funny...and stick figure-ish

http://img228.imageshack.us/img228/1228/mikesig0ql.gif

(and totally unrelated to the topic of course )

[Chumbelina]

It is from the same comic.

http://www.explosm.net

funny stuff

[Ashen]

I'm taking Calculus right now, and we just got to natural logs. Pretty tuff stuff...

What Calc curriculum are you taking? O_o

I did logs and natural logs in Elementary Functions (aka Algebra 3) yet haven't touched them in AB Calc this year. We're working with integrals and the first & second fundemental theorems of calculus in my class right now.

[Cyprus]

I'm in BC calc....help me....

[Gafgarionn]

Me too Cyprus, what're you guys on right now? Assuming you're using the same textbook, we're on 5.4

[Cyprus]

We're on section 7 or 8? We're doing the rotation of regions around the y and x axis and finding the volume of that rotation. It uses integrals n'stuff.

[LAGUNA]

We're on section 7 or 8? We're doing the rotation of regions around the y and x axis and finding the volume of that rotation. It uses integrals n'stuff.

Washer and Disk Methods?

[Enkidu]

Hell, while we are asking for help with math...

anti-derivative of cos^2(x) dx

Driving me crazy

{[Sin(x)+Cos(x)]/2} + (x/2)

edit: +C

Derivative of that is: (1/2)*(1+cos(x)-sin(x))

Integrating cos^2(x) gives: (1/2)*(x+cos(x)*sin(x))

This is a common integral, just look at the table of integrals in the back of your calc book. Note that trig functions can be simplified in many different ways so the answer the book gives may look different from my answer above.

[½pint]

You guys are noobs. Stochastic differential equations for the win.

[LAGUNA]

Hell, while we are asking for help with math...

anti-derivative of cos^2(x) dx

Driving me crazy

{[Sin(x)+Cos(x)]/2} + (x/2)

edit: +C

Derivative of that is: (1/2)*(1+cos(x)-sin(x))

Integrating cos^2(x) gives: (1/2)*(x+cos(x)*sin(x))

This is a common integral, just look at the table of integrals in the back of your calc book. Note that trig functions can be simplified in many different ways so the answer the book gives may look different from my answer above.

Oops i put a + instead of * my bad