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1. ### Show that if u + v and u - v are orthogonal then u and v have the same length.?

u + v are orthogonal because if you put u above v u get uv as in ultraviolet. u and v have the same length because it is...

1 Answers · Science & Mathematics · 13/09/2012

2. ### If both u and v are in quadrant II, sin u= 5/13, and cosv=-3/5, find cos(u+v).?

If both u and v are in quadrant II, sin u= 5/13, and cosv=-3/5, find cos(u+v). cos(u + v) = cos(u) cos(v) - sin(u) sin(v) sin(u) = 5/13 cos(v) = -3/5 we need to find cos(u) and...

6 Answers · Science & Mathematics · 30/05/2012

3. ### Find the sum of u+v​, given that ​|u​|=11, ​|v​|=15, and θ=51°​, where θ is the angle between u and v. the magnitude of u+v=?

U, V are vectors. Let U=15i, then V=11[cos(51*)i+sin(51*)j] U+V=[15+11cos(51*)]i+11sin(51*)j => U+V=21.92i+8.55j |U...

1 Answers · Science & Mathematics · 05/04/2016

4. ### Simplifying a ratio of polynomials?4u^2+28u+24 / u^2+6u+5?

(4u^2+28u+24)/(u^2+6u+5) = {4[(u^2+7u+6)]}/[(u+1)(u+5)] = [4(u+1)(u+6)]/[(u+1)/(u+5)] Cancel out the factor (u+1), then we get = 4(u+6)/(u+5) = (4u+24)/(u+5) Appendix: ...

3 Answers · Science & Mathematics · 07/01/2009

5. ### d/dx(u^v)=((u^(v-1)*v))u'+ ((u^v)*lnu)*v'?

u and v are both function of x, u=f(x) and v=g(x), Dx = d/dx y = u^v, what we have to differentiate...differentiation) Dx[ln(y)] = Dx[v] * ln(u) + v * Dx[ln(u)], chain rule Dx[y] / y = Dx[v] * ln[u] + v * Dx...

3 Answers · Science & Mathematics · 24/10/2009

6. ### how do u............?

well, u can dance. walking is good as long as its high endurance walking. u cant be lazy about it either. u have to want it bad enough for it to work.

2 Answers · Health · 27/08/2007

7. ### How would u...?

... don't like it 2 much since itz bad for business thingz and it lookz gross when u take it out but do what u want maybe it lookz good on u

3 Answers · Beauty & Style · 19/05/2010

8. ### If U_n = [U_{n-1}]² + a U_{n-1} + 1, find lim{n->∞} U_1 U_2 U_3 ... U_{n-1} / U_n.?

Write P_n = U_1 * U_2 * U_3 ... U_{n-1} / U_n a) Consider...between -1 and 1, so the limit does not exist. b) consider the case a = -2, U_1 = 0, U_2 = 0 - 0 + 1 = 1 U_3 = 1 - 2 + 1 = 0 So for...

2 Answers · Science & Mathematics · 04/09/2008

9. ### compute d/dt (u(t).v(t)) and d/dt (u(t).u(t)?

u(t).v(t) = <-sqrt(t) sint, t, t^(2/3)>.<-sqrt(t) sint, cos^2 t, -t^(1/3)>. u(t).v(t) = t*sin^2(t) + t*cos^2(t) - t = t - t = 0 (d/dt)[u(t).v(t)] = 0 u(t...

1 Answers · Science & Mathematics · 19/07/2009

10. ### Algebra 1 Math;; Help Me Solve for u?

u^2 + 8u + 7 = 0 (u + 7)(u + 1) = 0 Then u has to equal what's in the parentheses set equal to zero: u + 7 = 0 and u + 1 = 0 u = -7 and u = -1

3 Answers · Science & Mathematics · 06/04/2011