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Lady_Fox [76]
2 years ago
8

You look down at an object on the ground. If your eyes are

Mathematics
1 answer:
wolverine [178]2 years ago
3 0

Answer:

We can think of this as a triangle rectangle.

We know that you eyes are 55ft above the ground, this can be one cathetus.

We also know that you see with an angle of depression of 50°, from this angle, our known cathetus would be the opposite cathetus.

Now we want to know how far is the object from you, this would be the hypotenuse of the triangle rectangle.

So we only know one angle and the opposite cathetus to this angle, then we can use the relation:

Sin(θ) = (opposite cathetus)/(hypotenuse)

Then if we use this equation, we will get:

Sin(50°) = 55ft/hypotenuse

hypotenuse = 55ft/sin(50°) = 71.8 ft

This means that the distance between you and the object is 71.8 ft.

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Elden [556K]

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50\cdot\dfrac{dA}{A}=dt\\\\50\ln{(A)}+C=t\qquad\mbox{integrating}\\\\t=50\ln{\left(\dfrac{A}{4000}\right)}\qquad\mbox{applying the boundary condition}

This last expression looks like the one you describe. If you solve for A instead of t, you get

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Answer:

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For the circumference of the Sector with 60° in the figure, the circumference can be calculate by:

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So, the circumference of the full circle is 37.68 units and the circumference of the sector is 6.28 units.

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Hey There!

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