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1. ### Need help solving for U .?

u - 2/3 = - 4/3 u - 3/5 Multiply everything by 15(the GCM of 3 and 5) you get 15u -10= -20u -9 15u+20u= -9 +10 35u=1 u =1/35

3 Answers · Science & Mathematics · 08/03/2012

2. ### HELP!!! sin u = (4/5) 0< u <Pi/2?

sin( u ) = 4/5 = y/z x^2 + y^2 = z^2 x^2 + 4...x^2 = 25 - 16 x^2 = 9 x = 3 1) cos( u ) = x/z = 3/5 <==== positive since... to take the positive root. sin( u /2) = + √( (1-cos u )/2 ) sin( u /2) = √( (1- (3...

3 Answers · Science & Mathematics · 17/08/2011

3. ### If u dot (v x w) = | u ||v||w|, show that u dot v = u dot w = v dot w = 0?

By definition u .v x w = |v x w| | u | cosθ where θ is the angle between u and v x w... where Θ is the angle between v and w. So u .v x w = |v||w| sinΘ | u | cosθ and this is equal to | u ||v...

2 Answers · Science & Mathematics · 03/10/2009

4. ### Let U and V be subspaces of a vector space W.?

suppose u ,v are in U ∩V. since u .v are in U , u +v is in U , since U is a subspace. since u ,v ...

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

5. ### If u =sin^-1(√x^2+y^2) then x(∂ u /∂x) + y(∂ u /∂y)=?

u = arcsin[√(x² + y²)] ∂ u /∂x = 1/√[1 - (x² + y²)] • x/√(x² + ...) / √[1 - (x² + y²)] = tan[ u ] Note that u = arcsin[√(x² + y²)] implies that sin[ u ...

1 Answers · Science & Mathematics · 18/07/2011

6. ### Solve for U in this equation?

Multiply everything by ( u -1)( u -3) and then cancel identical terms to clear the fractions: ( u +7...3) / ( u -3) ( u +7)( u -3) + ( u -1)( u -3) = ( u +3)( u -1) Multiply everything out: u ^2 + 4u - 21 + u ^2 - 4u + 3 = u ^2 + 2u - 3 Combine terms: 2u^2 - 18...

4 Answers · Science & Mathematics · 09/05/2011

7. ### u , v and w are mutually perpendicular?

( u + v + w) · ( u + v + w) = ( u + v + w) · u + ( u + v + w) · v + ( u + v + w) · w = ( u · u + v · u + w · u ) + ( u · v + v · v + w · v) + ( u · w + v · w + w · w) = ( u · u + 0 + 0) + (0 + v · v + 0) + (0 + 0 + w · w), since u ,v,w are mutually perpendicular...

3 Answers · Science & Mathematics · 14/06/2015

8. ### What is sin u = 1/3 and sin v = 1/4?

sin( u ) = 1/3 = y/z x^2 + y^2 = z^2 x^2 + 1^2 = 3^2 x^2 = 9 - 1 x^2 = 8 x = 2√(2) cos( u ) = x/z = 2√(2)/3 sin(v) = 1/4 = y/z x^2 + y^2 = z^2 x^2 + 1^2 = 4^2...

4 Answers · Science & Mathematics · 06/11/2011

9. ### how do u know?

u dont u just feel it. like 4 me if i talk to someone,(a guy) for a while and i feel some sort of attraction, i just kinda get a crush on them and i know i like them

14 Answers · Family & Relationships · 14/10/2007

10. ### Solve the system of equations below by graphing them. what are the ordered pairs ( u , b)?

u = -b + 21 u = -2b + 30 Check it out - both equations are ... u " already. Thus, -b + 21 = -2b + 30 -b + 2b = 30 - 21 b = 9. u = -b + 21 = -(9) + 21 = 12 u = -2b + 30 = -2(9) + 30 = 12 So, the ...

2 Answers · Science & Mathematics · 01/06/2010