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emmainna [20.7K]
2 years ago
15

20 POINTS

Mathematics
1 answer:
Lilit [14]2 years ago
3 0

An isometric transformation is a transformation that preserves the distance and angles between a pre-image and its image. Examples are: translation, reflection, rotation.

Answer:

No, the side lengths are not preserved.

This is a non isometric transformation.

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CosA.cos2A.cos4A=sin8A/8sinA​
alexgriva [62]

I assume you're supposed to establish the identity,

cos(A) cos(2A) cos(4A) = 1/8 sin(8A) / sin(A)

Recall the double angle identity for sine:

sin(2<em>x</em>) = 2 sin(<em>x</em>) cos(<em>x</em>)

Then you have

sin(8A) = 2 sin(4A) cos(4A)

sin(8A) = 4 sin(2A) cos(2A) cos(4A)

sin(8A) = 8 sin(A) cos(A) cos(2A) cos(4A)

==>   sin(8A)/(8 sin(A)) = cos(A) cos(2A) cos(4A)

as required.

3 0
3 years ago
Select from the drop-down menus to correctly complete the sentence.
wlad13 [49]

Answer:

for anyone in the future that needs this the answer is The rule (x,y) ----> (x+2, y-4) represents a translation 2 units RIGHT and 4 units DOWN

Step-by-step explanation:


4 0
3 years ago
Read 2 more answers
An old road was 3.95 miles long. After a renovation it was 3.81 times as long. How long was the road after the renovation?
guapka [62]
3.95 × 3.81 = 15.0485

The road was 15.0485 miles long after the renovation.

Hope this helps!
4 0
3 years ago
I need help in this one ASAP please
Ber [7]

Step-by-step explanation:

A= 90 degree

B= 180

C=118

Student committed a minor act of plagiarism or cheating a second time in his/her work or exam for a class OR

committed a serious act of plagiarism or cheating. Serious acts include: copying or purchasing an essay or other

assignment and presenting it as your own, obtaining and using unauthorized materials (paper, electronic) or help

(verbal) during an exam, or obtaining extensive help from classmates or non-classmates for an exam. These can

result in a failing grade for the related assignment or exam

4 0
2 years ago
The prices of two ratios are in the ratio x:y
Archy [21]

Answer:

4:1

Step-by-step explanation:

x+20 : y+20 = 5 : 2

(x+20)/(y+20) = 5/2

2(x+20) = 5(y+20)

2x+40 = 5y+100

2x = 5y+60 (1)

x-5 : y-5 = 5:1

(x-5)/(y-5) = 5/1

x-5 = 5(y-5)

x-5 = 5y-25

x = 5y-20 (2)

Solve (1) & (2) simultaneously,

2(5y-20) = 5y+60

10y-40 = 5y+60

5y = 100

y = 20

x = 5y-20

x = 5(20)-20 = 100-20

x = 80

x:y

80:20

4:1

8 0
3 years ago
Read 2 more answers
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