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Charra [1.4K]
3 years ago
14

Help with question. 6

Mathematics
1 answer:
grin007 [14]3 years ago
8 0

This is science not mathematics and also I think the answer is A

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Which equation could be used to solve for the length of XY? XY = (22) sin (41°) XY = (22) cos (41°) XY = Start Fraction 22 Over
Solnce55 [7]

Answer:

Pythagorean's theorem: a²+ b²= c²

Sines: sin A = a/c, sin B = b/c.

Cosines: cos A = b/c, cos B = a/c.

Tangents: tan A = a/b, tan B = b/a.

Step-by-step explanation:

For example, if the side a = 22 and the angle A = 41°, we can use a sine and a tangent to find the hypotenuse and the other side. Since sin A = a/c, therefore c = a/sin A = 22/sin 41. Using a calculator, this is 22/0.6561 = 33.5314. Also, tan A = a/b, so b = a/tan A = 22/tan 41 = 22/0.8693 = 25.307.

4 0
3 years ago
Read 2 more answers
Help please I don’t know how to do this
Mashcka [7]
The correct answer is the last one
(0,-4)
4 0
2 years ago
Please help I need it ASAP!!
kotegsom [21]

Answer:

5+z=190....././......

7 0
3 years ago
a conical paper cup is hold 1/4 of a liter . find height and radius of cone which minimizes the amount of paper needed to make t
ASHA 777 [7]

Answer:

h ≈ 7.816 cm

r ≈ 5.527 cm

Step-by-step explanation:

The volume of a cone is:

V = ⅓ π r² h

The lateral surface area of a cone is:

A = π r √(r² + h²)

1/4 of a liter is 250 cm³.

250 = ⅓ π r² h

h = 750 / (π r²)

Square both sides of the area equation:

A² = π² r² (r² + h²)

Substitute for h:

A² = π² r² (r² + (750 / (π r²))²)

A² = π² r² (r² + 750² / (π² r⁴))

A² = π² (r⁴ + 750² / (π² r²))

Take derivative of both sides with respect to r:

2A dA/dr = π² (4r³ − 2 × 750² / (π² r³))

Set dA/dr to 0 and solve for r.

0 = π² (4r³ − 2 × 750² / (π² r³))

0 = 4r³ − 2 × 750² / (π² r³)

4r³ = 2 × 750² / (π² r³)

r⁶ = 750² / (2π²)

r³ = 750 / (π√2)

r³ = 375√2 / π

r = ∛(375√2 / π)

r ≈ 5.527

Now solve for h.

h = 750 / (π r²)

h = 750 / (π (375√2 / π)^⅔)

h = 750 ∛(375√2 / π) / (π (375√2 / π))

h = 2 ∛(375√2 / π) / √2

h = √2 ∛(375√2 / π)

h ≈ 7.816

Notice that at the minimum area, h = r√2.

6 0
3 years ago
Help me please! I would appreciate it! :)
zheka24 [161]

Answer:

-4

Step-by-step explanation:

distributing gets you to : 8h + 38 = -18 - 6h

then add 6h to 8h and you have 14h + 38 = -18

solve normally & thats how you get your answer

8 0
2 years ago
Read 2 more answers
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