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3 years ago

Need help! Urgent. Giving lots of points for this

Mathematics

1 answer:

ser-zykov [4K]3 years ago

7 0

Answer:

$y=3\sin(2x)$

Step-by-step explanation:

To find the equation of a sinusoidal curve, you need to know the period and the amplitude. The amplitude can clearly be seen to be at 3, while the period is just $\pi$ . Since there isn't any vertical or horizontal shift, the equation is simply:

$y=3\sin(2x)$

Hope this helps!

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On section AB, whose length is 192 cm, take the point C so that AC: CB = 1: 3. The point D is taken on the AC section so that CD

jasenka [17]

Answer:

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Step-by-step explanation:

Given:

AB = 192 cm
AC : CB = 1 : 3
CD = BC/12
The distance between midpoints of AD and CB = x

Find the length of AC and CB:

AC + CB = AB
AC + 3AC = 192
4AC = 192
AC = 192/4
AC = 48 cm

Find CB:

CB = 3AC = 3*48 = 144 cm

Find the length of CD:

CD = BC/12 = 144/12 = 12 cm

Find the length of AD:

AD = AC - CD = 48 - 12 = 36 cm

Find the midpoint of AD:

m(AD) = 36/2 = 18 cm

Find the midpoint of CB:

m(CB) = AC + 1/2CB = 48 + 144/2 = 48 + 82 = 130 cm

Find the distance between the midpoints:

x = 130 - 18 = 112 cm

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