# Yahoo Web Search

1. Sort by

1. ### TRIGONOMETRY Let u = 8i + 7j and v = 7i − j.?

u = 8i + 7j → tan(u) = 7/8 v = 7i - j → tan(v) = - 1/7 tan(a - b) = sin(a - b) / cos(a - b...tan(b)] / [1 + tan(a).tan(b)] → adapt this result to your case tan(u - v) = [tan(u) - tan(v)] / [1 + tan(u).tan(v)] tan(u - v) = [(7/8) - (- 1/7...

2 Answers · Science & Mathematics · 29/04/2019

2. ### Let u =<3, 1> and v =<−2, 6. Find u-3v. Find |u+v|.?

a) u-3v multiplying vextors by a scalar number such as 3 simply... vectors is <x1±x2,y1±y2>. u-3v=<3-(-6),1-18> = <9,-17> b) We use...

1 Answers · Science & Mathematics · 29/04/2019

3. ### In a triangle, the angles are u°, v° and w°.?

If v is half of w: v = w/2 and u is the mean of v and w: u = (v + w) / 2 And you...240 w = 80 Now that we have w we can solve for v and u: v + w = 120 v + 80 = 120 v = 40 u = (v + w) / 2 u = (40 + 80...

3 Answers · Science & Mathematics · 25/10/2019

4. ### U substitution?

You were doing fine. I would not try to factor anything. Just proceed with the substitutions. u = 2x³ + 6x du/dx = 6x² + 6 du = (6x² + 6) dx ∫ (6x² + 6)sin(2x³ + 6x) dx = ∫ sin(u) du

1 Answers · Science & Mathematics · 31/08/2019

5. ### Find u, v, and w?

8u - 8 = 4 - 4w 8u + 4w = 12 2u + w = 3 w = 3 - 2u w = u + v 3 - 2u = u + v v = 3 - 3u 8u = 4 + 6v 8u = 4 + 6 * (3 - 3u) 4u = 2 + 3 * (3 - 3u) 4u = 2 + 9 - 9u 13u = 11 u = 11/13 v = 3 - 3u v = 3 - 33/13 v = 39/13 - 33/13 v = 6/13 w = u + v w = 11/13 + 6/13 w = 17/13

2 Answers · Science & Mathematics · 16/09/2019

6. ### Let u be the vector with initial point P(7, −8) and terminal point Q(−2, 5). Find the length of u.?

u = - 9 i + 13 j I u I = [ 81 + 169 ]^(1/2) I u | = 250^(1/2) = 5 √10

4 Answers · Science & Mathematics · 29/04/2019

7. ### if n(U) = 90, n(A'∩B')=21, n(A'∩B)=18, n(A∩B')=25 Find (A ∩ B) and n(A U B)?

...39;∩B' , so n(A∪B) + n(A'∩B') = n(U) n(A∪B) + 21 = 90 n(A∪B) = 90 - 21 n(A∪...

2 Answers · Science & Mathematics · 17/09/2019

8. ### Using the vectors given, please find u - v: u = -7i + 12j and v = 8i - 15j. Please show work.?

u - v = (-7i + 12 j) - ( 8i - 15j ) u - v = - 15 i + 27 j

2 Answers · Science & Mathematics · 05/02/2019

9. ### Will someone please help me...I thought U and V equaled 4 times the square root of 2. But according to my answer sheet it’s 4. Help!?

It's an isosceles triangle so u and v are equal and Pythagoras requires that u²...

9 Answers · Science & Mathematics · 19/07/2019

10. ### Using polar coordinates, evaluate the integral ∫∫Rsin(x2+y2)dA where R is the region 16≤x2+y2≤25.CAN U HELP ME PLS?

...π) ∫(r=4 to 5 ) r * sin( r² ) dr dθ but ∫ r * sin( r² ) dr let u = r² such that du = 2r dr and that dr = du/(2r) ∫ r *sin( r² ) dr...

2 Answers · Science & Mathematics · 13/05/2019