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3 years ago

Helpppp plzzzzzzzzzzzzzzzz

Mathematics

1 answer:

mariarad [96]3 years ago

8 0

I’m a bit confused by the choices you have been given. Are there any other options? If not, I would choose (5.3,9.8) as 9.8 is correct

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Let z =38 (cos(pi/8)+ i sin(pi/8)) and w = 2 (cos( pi/16 ) + i sin(pi/16))

mario62 [17]

Answer:

$zw=76 * (cos(\frac{3\pi}{16}) +isin(\frac{3\pi}{16}) )$

Step-by-step explanation:

Given

$z =38 (cos(\frac{\pi}{8})+ i sin(\frac{\pi}{8})$ and

$w = 2 (cos(\frac{\pi}{16} ) + i sin(\frac{\pi}{16})$

Required

Determine zw

Given that:

$x = v_1(cos(a) + isin(a))$ and $y = v_2(cos(b) + isin(b))$

$x * y = (v_1 * v_2)*((cos(a+b) + isin(a+b))$

So, we have:

$zw=(38 * 2) * (cos(\frac{\pi}{8} + \frac{\pi}{16}) + isin(\frac{\pi}{8} + \frac{\pi}{16}))$

$zw=76 * (cos(\frac{2\pi + \pi}{16})+isin(\frac{2\pi + \pi}{16}))$

$zw=76 * (cos(\frac{3\pi}{16}) +isin(\frac{3\pi}{16}) )$

7 0

3 years ago

What is x equal to in this equation 5x-20<-5

kari74 [83]

The solution to given inequality is:

x<3

Step-by-step explanation:

We have to solve the given inequality to get the value of x

Given inequality is:

$5x-20$

Adding 20 on both sides

$5x-20+20$

Dividing both sides by 5

$\frac{5x}{5}$

The solution to given inequality is:

x<3

x will be equal to all values less than 3

Keywords: Inequality

Learn more about inequality at:

#LearnwithBrainly

5 0

3 years ago

write the point-slope from of the line that passes through the points (-2,1) and (0,1) identify (x1,y1) as (-2,1) use the box pr

yanalaym [24]

Answer:

y - 1 = x

Step-by-step explanation:

Plug x, y and m into equation

y- y₁ = m(x-x₁)

find m: y₂-y₁/x₂-x₁ 1-1/0+2

0/2 = 0

I used the point (0,1) and plugged them into the point slope formula

5 0

3 years ago

3 5⁄7 + 1 9⁄14<br> helppppppppppppppppppppp

Viefleur [7K]

5 5/14

You can convert mixed fractions to solve it’s an easier method :)

5 0

3 years ago

Here is a table of values for y = f(x).

Vladimir79 [104]

I think the answer is 10-11

6 0

3 years ago