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Verify if sin^3 x - cos^3 x = (sinx - cosx)(1 + sinxcosx)

Posted by greynose on September 29, 2010 at 12:19 AM via web.

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Prove the equality for any real x ( sinx + cosx )^2 = 1 + 2sinx*cosx

Posted by lillyan on September 29, 2010 at 12:13 AM via web.

Find the quadratic whose graph is passing through the points (-1,3), (0,-1), (2,4)

Posted by potziunea on September 29, 2010 at 12:00 AM via web.

Determine the function f(x) if f'(x)= 4x^3 + 2x.

Posted by pavelpimen on September 28, 2010 at 11:34 PM via web.

1 educator answer.

Calculate the intercepting point of the lines x+7y=21 and 2x-y=11

Posted by bibiloi on September 28, 2010 at 11:26 PM via web.

Explain the golden triangle .

Posted by greenturtle on September 28, 2010 at 10:14 PM via web.

What type of function is F(x)=(x-2)^1/2,x>=2 ; F(x)=(2-x),x<2.

Posted by museinspires on September 28, 2010 at 10:10 PM via web.

Determine the length of AB and AD sides from ABCD parallelogram with AD = 3/5AB if ABCD's...

Posted by landishigh on September 28, 2010 at 10:00 PM via web.

Find the solution for the equation [(x + 7)^1/2] + [ x - 1)^1/2] = 4

Posted by fryvonne on September 28, 2010 at 9:50 PM via web.

Can somebody give me steps on how to go about doing formula rearrangement? (algebra)

Posted by angel-girl on September 28, 2010 at 9:37 PM via web.

If 3sinx = 2cosx determine tanx using right angle triangle.

Posted by essesy on September 28, 2010 at 9:35 PM via web.

Solve the system 2x + 3y + 4z = 0 4x + 9y + 16z = 0 8x + 27y + 64z = 0

Posted by catbyshe on September 28, 2010 at 9:29 PM via web.

Find the parameter a that belongs to R if parabola y = (a + 1)*x^2 + a*x + 3 and the line y = x +...

Posted by fortunee on September 28, 2010 at 9:13 PM via web.

Given the polynomial expression E = x^4 + 4 determine the sum of the roots x1 + x2 + x3 + x4 .

Posted by solvedphyz on September 28, 2010 at 7:55 PM via web.

Determine tg(a+b) if a belongs to (0;pi/2) and b belongs to (pi/2;pi) and sina=1/2, sinb=2/3 .

Posted by starshippiy on September 28, 2010 at 7:46 PM via web.

Solve the system with two methods: 5x + 2y =10 x - 8y =12

Posted by lessoflot on September 28, 2010 at 7:30 PM via web.

Determine the median in ABC triangle that stats fom A vertex if A(1;2), B(2;3), C(2;-5).

Posted by electrika on September 28, 2010 at 7:22 PM via web.

Knowing f(-1) = 1, f(0) = 1, f(1) = 3 determine the second grade function.

Posted by for3cast on September 28, 2010 at 7:12 PM via web.

Solve z^4 + 1/z^4 with the complex roots method.

Posted by sodelete on September 28, 2010 at 7:05 PM via web.

Determine the limit of the function if x--> infinite . F(x)=lim(1+1/7x)^x

Posted by kamused on September 28, 2010 at 6:51 PM via web.

Check the relation : arcsin4/5 + arcsin5/13 + arcsin16/65 = pi/2

Posted by afrokaa on September 28, 2010 at 6:36 PM via web.

i am the( gcf) of 3 nmbrs. Their sum is 36.The largest nmbr is twice the smllst nmbr and the...

Posted by mathman142 on September 28, 2010 at 1:22 PM via web.

2 cars leave intersection at same time. One is headed south at constant speed of 30 mph, and the...

Posted by hinkberries on September 28, 2010 at 12:23 PM via web.

Can you please explain this is easy steps?A small corral is to be built so that is also has fence...

Posted by basketballallstar on September 28, 2010 at 11:52 AM via web.

the parabola y=3x^2+18x+19 will have a minimum at what?

Posted by canucksalltheway on September 28, 2010 at 11:37 AM via web.

helpin a 120-volt circuit having a resistance of 12 ohms, the power W in watts when a current I...

Posted by hollister7 on September 28, 2010 at 10:42 AM via web.

Find a number such that when you add it to twice its square the sum is minimized.

Posted by lollipoplilwayne on September 28, 2010 at 8:15 AM via web.

What is the maximum area that the enclosure described below can contain?You have 32 m of fencing...

Posted by imnumber1 on September 28, 2010 at 7:57 AM via web.

Why is the right hand side of levi-cevita identity anti-symmetric?

Posted by kupferman on September 28, 2010 at 6:59 AM via web.

How to integrate function 1/sin^2x*cos^2x?

Posted by shoppana on September 28, 2010 at 3:23 AM via web.

If the vertex of the curve ax^2 + (2a+1)x + a-1 is on the line y=3x-1, which is a?

Posted by jolenta on September 28, 2010 at 3:11 AM via web.

if the roots of the Q.E. are equal then prove that b²=4ac.10 class quadratic equations.

Posted by rishabh050996 on September 28, 2010 at 2:39 AM via web.

Establish the relative position of the lines 2x+y-3=0 and 4x+2y+1=0

Posted by maxine60 on September 28, 2010 at 2:29 AM via web.

Given y = mx^2 + (2m - 1)*x + m + 3. Calculate m if the image of the function is [3,+infinite).

Posted by roperswen on September 28, 2010 at 2:19 AM via web.

Determine m if the function f has two real roots. The roots are not equal. f = mx^2 + (m-1)*x - m...

Posted by t3rm1ka on September 28, 2010 at 2:10 AM via web.

Calculate the indefinite integral of f(x)=1/(cos2x + sin^2x)

Posted by lexijuly on September 28, 2010 at 1:58 AM via web.

How do I solve the equation 2X+Y<=1000

Posted by kathy215 on September 28, 2010 at 1:16 AM via web.

What is the diameter of sphere whose volume is 1372\81 cm3 and the volume of sphere is : 4\3 x...

Posted by suzy555 on September 27, 2010 at 11:42 PM via web.

Prove that if the probability P{ A/B} = P {A}, then A and B must be independent.Please help me out.

Posted by bobbysunil on September 27, 2010 at 8:16 PM via web.

1) A rectangle meas. 87.59 cm by 35.1 mm. Express area with the proper number of sign. fig. in...

Posted by blester on September 27, 2010 at 1:42 PM via web.

Please solve the following equation: 2.5(x-3)+1.7x=10.8(x+1.5)Include a step by step how you...

Posted by animallover on September 27, 2010 at 9:59 AM via web.

2 educator answers.

Based on the following information, what is the maximum width of the walkway?You are building a...

Posted by catlover on September 27, 2010 at 9:55 AM via web.

Show how three lines in a plane can intersect in no points, exactly one point, exactly two...

Posted by digit17 on September 27, 2010 at 9:11 AM via web.

How do i find the domain of the function f(x) = ln(cos(x))?

Posted by nickolean on September 27, 2010 at 9:11 AM via web.

The floor of a room is covered with a carpet with a 2-color design. The room is square shaped....

Posted by printsaltr on September 27, 2010 at 3:25 AM via web.

Use l'Hospital's rule to evaluate the limit. lim f(x) x-->3 f(x)= ( x^2 - x -6 )/( x - 3 )

Posted by lipiciuc on September 27, 2010 at 3:01 AM via web.

Evaluate the limit of f(x)=(2x^2-4x)/(x-2) x-->2

Posted by merishorverde on September 27, 2010 at 2:53 AM via web.

Does lim f(x), x-->-1, exist? If so which is the value of the limit. f(x)=(2x^2-x-3)/(x+1)

Posted by betzishor on September 27, 2010 at 2:43 AM via web.

Given that dy / dx = 0 calculate x . y = 2x^4+4x^2+1

Posted by zarvamea on September 27, 2010 at 2:27 AM via web.

x + y = 1. f'(x) = 3x + 2. Which are the values of x, y.

Posted by mabottle on September 27, 2010 at 2:19 AM via web.

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