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2 years ago

Which of these ratios are equivalent ratio 1:4 2:8 3:6 7:28

Mathematics

1 answer:

Harrizon [31]2 years ago

5 0

Answer:

1:4

2:8

7:28

Step-by-step explanation:

1:4
2:8 , 1:4
7:28, 1:4

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Which of the following are identities? Check all that apply

Natasha2012 [34]

Answer:

A, C

Step-by-step explanation:

Actually, those questions require us to develop those equations to derive into trigonometrical equations so that we can unveil them or not. Doing it only two alternatives, the other ones will not result in Trigonometrical Identities.

Examining

A) True

$\frac{1-tan^{2}x}{2tanx} =\frac{1}{tan2x} \\ \frac{1-tan^{2}x}{2tanx} =\frac{1}{\frac{2tanx}{1-tan^{2}x}}\\ tan2x=\frac{1-tan^{2}x}{2tanx}$

Double angle $tan2\alpha =\frac{1 -tan^{2}\alpha }{2tan\alpha}$

B) False,

No further development towards a Trig Identity

C) True

Double Angle Sine Formula $sin2\alpha =2sin\alpha *cos\alpha$

$sin(8x)=2sin(4x)cos(4x)\\2sin(4x)cos(4x)=2sin(4x)cos(4x)$

D) False No further development towards a Trig Identity

$[sin(x)-cos(x)]^{2} =1+sin(2x)\\ sin^{2} (x)-2sin(x)cos(x)+cos^{2}x=1+2sinxcosx\\ \\sin^{2} (x)+cos^{2}x=1+4sin(x)cos(x)$

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3 years ago

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I got more points so here is more

BartSMP [9]

Answer:

woah thankssss a lotttt

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3 years ago

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Angle A and angle B are complementary

Nikitich [7]

Answer:

Step-by-step explanation:

∠A + ∠B = 90° {given they are complementary}

5x+ 15 + 30 = 90

5x + 45 = 90

5x = 90 - 45

5x = 45

x = 45/5

x = 9

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3 years ago

You go to the doctor and he gives you 13 milligrams of radioactive dye which decays exponentially. After 24 minutes, 5 milligram

suter [353]

78 minutes...............................................

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3 years ago

The question states: <br> Factor. <br><br> 9v+18.

Evgen [1.6K]

9(v+2)
When you factor you are essentially dividing by 9 when you take it out and add parenthesis

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3 years ago

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