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2 years ago

Given that sin? x + cos2x = 1

Mathematics

1 answer:

Pachacha [2.7K]2 years ago

8 0

Answer:

the answer is

$\frac{ \sqrt{23} }{5}$

cause sin²x= 2/25

so cos²x would be 1-2/25= 23/25

then cos x is what I wrote as the answer

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What is the soulution set of the equation 3x^2=48

valentina_108 [34]

Answer:

x = ± 4

Step-by-step explanation:

given 3x² = 48 ( divide both sides by 3 )

x² = 16 ( take the square root of both sides )

x = ± $\sqrt{16}$ = ± 4

x ∈ {- 4, 4 }

8 0

3 years ago

Read 2 more answers

R+(-5r) I really need a step by step answer

Dennis_Churaev [7]

Answer:

+×- =-

r-5r

-4r is the best answer

5 0

3 years ago

HELPPPP PLZZ ND THANK YOU SOO MUCH

swat32

Answer:

50, 40, 30, 250, 350

Step-by-step explanation:

1/2 = 0.5, 0.5 x 100 = 50 (0.5 -> 5 -> 50)

2/5 = 0.4 (10 / 5 [the denominator] = 2, 0.2 x 2 [the numerator] = 0.4), 0.4 x 100 = 40 (0.4 -> 4 -> 40)

3/10 = (10 / 10 [the denominator] = 1, 0.1 x 3 [the numerator] = 0.3), 0.3 x 100 = 30 (0.3 -> 3 -> 30)

5/2 = 2.5 (2 1/2), 2.5 x 100 = 250 (2.5 -> 25 -> 250)

7/2 = 3.5 (3 1/2), 3.5 x 100 = 350 (3.5 -> 35 -> 350)

Note: I'm not sure if I understand the question completely, but I changed the fraction into a decimal and multiplied it by 100. Not sure what it means by "Divide fraction".

3 0

2 years ago

1/6+1/12 Write the Awnser in lowest terms Show your work

Nezavi [6.7K]

Answer:

1/4

Step-by-step explanation:

1/6 + 1/12

Multiply the numerator and denominator of the first fraction by 2.

2/12 + 1/12

Add both fractions, because they have a common denominator.

3/12

The fraction can be further simplified.

1/4

6 0

3 years ago

What are the main properties of a rectangle Use rectangle (BCDE) to help you .

OleMash [197]

Answer:

it must be number 1

I am sure about parallel side and 4 right angles

6 0

3 years ago