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3 years ago

Find the angle θ between the vectors. u = cos π 4 i + sin π 4 j v = cos π 2 i + sin π 2 j

Mathematics

1 answer:

Nadusha1986 [10]3 years ago

5 0

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HELP PICTURE IS SHOWN

Sergeu [11.5K]

You will need option A
AB = PQ

8 0

4 years ago

Read 2 more answers

Need urgent help in mathematics!! Will mark brainliest!!!!

GaryK [48]

use the same concept as the previous question you posted.

₄P₄ = $\frac{4!}{(4 - 4)!}$

= $\frac{4!}{0!}$

= $\frac{4*3*2*1}{1}$

= 4 * 3 * 2

= 24

Answer: D

7 0

4 years ago

Which algebraic expression will solve for the blue area of this square figure?

Hitman42 [59]

Answer:

Option B. $-2x+30$

Step-by-step explanation:

we know that

The blue area is equal to the area of complete rectangle minus the area of the white rectangle

$A=(5+3x)(6)-(5)(4x)\\\\ A=(30+18x)-(20x)\\ \\A=-2x+30$

4 0

4 years ago

Read 2 more answers

Find an equation of the line L that contains the points (0,0) and (5,3)<br><br> Y =

ZanzabumX [31]

Answer:

y = (3/5)*x

Step-by-step explanation:

First, we can use the slope-intercept form of a line, or y=mx+b

To find the slope, m, we can find

(y₂-y₁)/(x₂-x₁). Denoting (0,0) as (x₁,y₁) and (5,3) as (x₂, y₂) (it is perfectly okay to have (0,0) as (x₂, y₂) and (5,3) as (x₁,y₁) as well), we have

(y₂-y₁)/(x₂-x₁) = (3-0)/(5-0) = 3/5

Therefore, our equation is

y = (3/5)x + b

To solve for b, we can plug any value of (x,y) from the line, e.g. (0,0), and solve from there, resulting in

y = mx + b

0 = (3/5)*0 + b

0 = b

Our equation is therefore

y = (3/5)*x + 0

= (3/5)*x

8 0

3 years ago

31 billion in scientific notation

olganol [36]

Answer/Explanation:

1 Billion in scientific notation is $1*10^{9}$

Multiply the value of 1 billion for 31:

$31*(1*10^{9} )=$

$31*10^{9}=$

$3.1*10^{10}$ would be your answer

7 0

3 years ago