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zepelin [54]
2 years ago
12

I need help with this trigonometry problem.

Mathematics
1 answer:
irina1246 [14]2 years ago
4 0
The sum of all 3 angles in a triangle is 180
180-44=136
And you know that angle A is over 90 degrees so I believe it is 100 leaving angle b to be 36
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Identify the graph of x^2-8y=0 for theta=90º and write and equation of the translated or rotated graph in general form.
vredina [299]

Answer:

The answer is parabola; (y')² - 8x' = 0 ⇒ answer (b)

Step-by-step explanation:

* At first lets talk about the general form of the conic equation

- Ax² + Bxy + Cy²  + Dx + Ey + F = 0

∵ B² - 4AC < 0 , if a conic exists, it will be either a circle or an ellipse.

∵ B² - 4AC = 0 , if a conic exists, it will be a parabola.

∵ B² - 4AC > 0 , if a conic exists, it will be a hyperbola.

* Now we will study our equation:

* x² - 8y = 0

∵ A = 1 , B = 0 , C =

∴ B² - 4AC = (0)² - 4(1)(0) = 0

∵ B² - 4AC = 0

∴ it will be a parabola.

∵ Ф = 90°

* The point (x , Y) will be (x' , y')

∵ x = x'cosФ - y'sinФ and y = x'sinФ + y'cosФ

∵ cos(90) = 0 and sin(90) = 1

∴ x = -y' and y = x'

* lets substitute x and y in the first equation

∴ (-y')² - 8(x') = 0

∴ (y')² - 8x' = 0

* We notice that the x' took the place of y and y' took the place of x

∴ The parabola rotated around the origin by 90°

∴ The equation of the parabola is (y')² - 8x' = 0

* The answer is parabola, with angle of rotation 90°

* The equation is (y')² - 8x' = 0

* Look to the graph

- The blue is x² - 8y = 0

- The green is (y')² - 8x' = 0

7 0
3 years ago
Read 2 more answers
Which is the following equation rewritten in slope-intercept form: -8x=2-2y. A) y=1/4x+1. B) y=4x+1. C). Y=-4x+1. D) y=-4x-1
nevsk [136]

Step-by-step explanation:

-8x = 2 - 2y

2y - 8x = 2

2y = 8x + 2

y = 4x + 1

Answer B.

8 0
3 years ago
Read 2 more answers
2/3 (6y - 4) = - 4y <br>​
Nookie1986 [14]

Answer:

y = 1/3

Step-by-step explanation:

2/3 (6y - 4) = - 4y

2(6y-4)/3 = -4y

2(6y-4) = (-3)(4y)

y = 1/3

7 0
2 years ago
Read 2 more answers
What’s the answer for this question?
qaws [65]

Answer:

d.

Step-by-step explanation:

you would put 4 in the x places and 2 in the yplaces and then you would distribute 4^2 +3(2)/4(2)

16+6/2=22/8=2 3/4

8 0
3 years ago
How many acute, obtuse, and right angles are in this figure?
marta [7]
Hello!

Acute angles are angles less than 90°

A right angle is a angle that is exactly 90°

A Obtuse angle is a angle that is more than 90°

Looking at the picture there are

acute angles - 2
obtuse angles - 2
right angles - 0

Hope this helps!
5 0
3 years ago
Read 2 more answers
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