## Search found 226 matches

Tue Dec 27, 2016 9:26 pm
Forum: Beginning Algebra
Topic: why does x + -8/9of x = 1/9 of x
Replies: 2
Views: 1615

### Re: why does x + -8/9of x = 1/9 of x

The equation is (the square root of x /2 ) + 8/9 of x + 2 = x I'm taking this to mean: \sqrt{\dfrac{x}{2}\,}\, +\, \dfrac{8}{9}\,x\, +\, 2\, =\, x So I found an answer and the first 3 steps are as follows: 1.[orig. eqn] 2. add -2 to both sides 3. add -8/9 of x to both sides I think you did this: \s...
Tue Dec 27, 2016 9:18 pm
Forum: Trigonometry
Topic: Equivalent expressions Trig: sin theta + cos theta ( sin theta/cos theta)
Replies: 3
Views: 1052

### Re: Equivalent expressions Trig: sin theta + cos theta ( sin theta/cos theta)

What is the equivalent of the following expression sin theta + cos theta cot theta? I don't know if there is a "the" equivalent maybe there's LOTS of equivalents! (these Qs aren't really fair, I think) I started by finding equivalent for cot theta. sin theta + cos theta ( sin theta/cos theta) This ...
Wed Dec 14, 2016 11:40 pm
Forum: Trigonometry
Topic: trig function question 2
Replies: 1
Views: 765

### Re: trig function question 2

I am looking for a solution for this: what have you tried so far? where are you stuck? A Ferris wheel has a radius of 36.6 feet. The bottom of the Ferris wheel sits 0.6 feet above the ground. You board the Ferris wheel at the 6 o'clock position and rotate counter-clockwise. the radius is 36.6; what...
Wed Dec 14, 2016 11:36 pm
Forum: Trigonometry
Topic: trig function question
Replies: 1
Views: 376

### Re: trig function question

is there a picture that goes with this?
i'm having trouble "seeing" this in my head
thnx
Fri Nov 25, 2016 7:40 pm
Forum: Trigonometry
Topic: Need help verifying an identity - sums and differences
Replies: 2
Views: 683

### Re: Need help verifying an identity - sums and differences

Can anyone help me verify this identity? tan (a-b) = (1 - cot(a) tan(b)) / cot(a) + cot(b) they show how to do this stuff here: http://www.purplemath.com/modules/proving.htm the right hand side (RHS) is messier so try starting there see if maybe the fraction simplifies 1 - cot(a)tan(b) = 1 - cot(a)...
Wed Oct 12, 2016 2:50 pm
Forum: Beginning Algebra
Topic: floor tiles: 12" by 12"; how many needed for 12ft by 31ft floor?
Replies: 6
Views: 1073

### Re: floor tiles: 12" by 12"; how many needed for 12ft by 31ft floor?

How many tiles will I need when covering a floor which measures 12ft by 31ft. The tiles are 12 inches by 12 inches. there are 12" in 1' so the tiles are 1' by 1' or 1' square. my steps so far: 12 x 31 = 372 now since the tiles are in inches I need to convert that 372 feet into inches. so 372 x 12 =...
Fri Aug 19, 2016 7:07 pm
Forum: Trigonometry
Topic: Given that ×=tan theta find arcot x in terms of theta
Replies: 1
Views: 927

### Re: Given that ×=tan theta find arcot x in terms of theta

Given that × = tan(@), find arcot(x) in terms of @ i'm using "@" for "theta" do the regular placeholder triangle: triangle: . , '| , ' | , ' | x , '@ | *----------------* 1 so tan(@) = x/1 = x every triangle has 180* angle sum & this is a right triangle get an expression in "@" for the third angle ...
Thu Jul 28, 2016 3:48 pm
Forum: Uncategorized
Topic: Where to start?
Replies: 1
Views: 1443

### Re: Where to start?

they should give you a placement test so they start you out where you need to be based on what you remember: http://www.purplemath.com/modules/placment.htm since only you (or a test) can know what you remember only you (or the test) can say where you need to start. you have to go back to whatever yo...
Mon May 30, 2016 2:18 pm
Forum: Intermediate Algebra
Topic: Graphing calculator resources?
Replies: 1
Views: 1019

### Re: Graphing calculator resources?

I'm trying to follow along on some of the examples using a TI-84 plus calculator, and I can't get the graphs to come out the same as the examples. Only way I know how to graph quadratic equations is pressing "y=", filling out the equation, and hitting graph. Not sure what to search to even figure o...
Fri May 20, 2016 5:27 pm
Forum: Intermediate Algebra
Topic: Work problem
Replies: 1
Views: 1281

### Re: Work problem

How would I do the following work word problem? they show how here: http://www.purplemath.com/modules/workprob.htm Tom and Sam can finish a plowing job in two hours. Tom working alone can do the job in 7 hours. How long would it take Sam to finish the same job alone? do like they show: hours to com...