# trig

posted by .

find the math product of u and v
u= (6,7)
v= (-3,9)

• trig -

Could be a dot product (scalar product) or could be a vector product (cross product)

If a dot product then
6*-3 + 7*9 = 45

If a cross product then
i j k
6 7 0
-3 9 0 do determinant

k (6*9 -(7*-3) ) = k (54+21) = 75 in z direction

## Similar Questions

1. ### math

Find the two numbers that multiply to the product number and add to the sum number of the following: a)Product 563033256; Sum 51895 b)Product -43481220; Sum 28429 c)Product 2545124358; Sum -105619 I tried xy = product and x+y = sum, …
2. ### math

what is 7-2i in trig form? and if u=3j and v=7i+j what is the dot product of u times v don't get this one because there are no i terms for u thanks
3. ### calculus

Find two unit vectors that make an angle of 60° with v = ‹3, 4›. Give your answers correct to three decimal places. I'm not sure what to do here; I believe that I use to definition of a dot product (or maybe cross product) with …
4. ### trig

write a product of two trig functions that equals 1.
5. ### trig

Find the dot product of u and v u= 3i+7j v= 11i-5j
6. ### math

how do you do anarrays and an expanded algorithm problem find each partial product then add to find the product. 29 x47 -------- ()() ()()() ()()() + ()()() -------- ()()()()
7. ### trig

Find the dot product a*b. a= (5,-9), b=(4,-3)
8. ### Math Ms. Sue please

1. What is the product of (-6.8)^2? -13.6 46.24 -46.24 13.6 2. Find the product. 5/10 * 10/3 23/6 -5/7 -7/5 5/3 3. Find the quotient. 3/7 ÷ 1/2 3/14 6/7 13/14 4/7 4. Simplify the expression. 3/4 ÷ 2/5 3/10 23/22 15/8 5/9 My answers:
9. ### Math

Using the expression 56xy + 5 -6x + y/20,find the following: a. Find two sums. b. find the terms of the expression. c. find a product of two factors. Find the coefficient in the product. d. Find the quotient. This is to hard. Where …
10. ### math

Find the product of 27×60. Then explain how you would use mental math to find the product of 27×600

More Similar Questions