trigonometry
posted by jenna .
find the dot product of u=2i7j and v=i+8j

trigonometry 
Damon
2*1 = 2
7*8 =  56
+256 = 54
Respond to this Question
Similar Questions

Math  Product Dot Vectors
How would you expand and simplify the following equation? 
Math  Vectors
If "u = (2,2,1)", "v = (3,1,0)" and "w = (1,7,8)", verify that "u (dot) (v + w) = u (dot) v + u (dot) w". My work: LHS: u (dot) (v + w) = (2,2,1) (dot) (4,6,8) = [(2,2,1) (dot) (3,1,0)] + [(2,2,1) (dot) (1,7,8)] = [u (dot) v] … 
Calculus  Dot Product
consider a rhombus ABCD a) find the resultant of vector AB + vector AD and vector AB  vector AD? 
Mathematics  Dot Product
Consider rhombus ABCD a) Find the resultants of vector AB + vector AD and vector AB  vector AD b) What will the value of (vector AB + vector AD) dot product (vector AB  vector AD) always be? 
TRIGONOMETRY
Use the dot product to determine which of the following vector pairs are orthogonal. a. v1 = (5,5) and v2 = (1,1) b. v1 = (154,169.4) and v2 = (88,64) 
dot product of vecotrs
Question: Find (3a+b)dot(2b4a) if a=i3j+k and b=2i+4j5k I did: =3(1,3,1)+(2,4,5)dot 2(2,4,5)4(1,3,1) =(3,9,3)+(2,4,5)dot(4,8,10)(4+12,4) =(1,5,2)dot(0,4,6) =(0,20,12) =0+20+12 =32 The text book answer is 80. … 
Vectors: Dot product
Given a and b unit vectors if a+b=square root 3, determine (2a5b)dot(b+3a) First I foiled the whole thing: =2(a dot b)+ 6 (a dot a)  5(b dpt b) 15(a dot b) =13(a dot b) + 6(a dot a)  5(b dot b) =13(1)(1)+65 =13+1 =12 Textbook … 
Vectprs and Scalars
Why are some of these scalars and others are vectors? 
Math
Hi! Can someone help me with these? Thanks a bunch! :) 1.) Find the dot product. <0, 3> ∙ <4, 2> 2.) Find the dot product of u and v. u = <4, 1> v = <2, 3> 
Math
Hi! Can someone help me with these? Thanks a bunch! :) 1.) Find the dot product. <0, 3> ∙ <4, 2> 2.) Find the dot product of u and v. u = <4, 1> v = <2, 3>