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coldgirl [10]
3 years ago
11

A circus artist is climbing a 20 m long rope, which is

Mathematics
1 answer:
andreyandreev [35.5K]3 years ago
7 0
Length of the rope is 20 m and angle made by the rope with the ground level is 30°.
Given:
AC = 20 m and angle C = 30°
To Find:
Height of the pole
Let AB be the vertical pole
In right ΔABC,
using sine formula
sin 30° = AB/AC
Using value of sin 30 degrees is 1/2 , we have
1/2 = AB/20
AB= 20/2
AB= 10
Therefore,the height of the pole is 10m.
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vekshin1

Hello from MrBillDoesMath!

Answer:

The fourth choice,  b = +\- sqrt( sg + a^2)

Discussion:

s = (b^2 - a^2)/g     =>              multiply both sides by "g"

sg = b^2 - a^2        =>               add a^2 to both sides

sg + a^2 = b^2       =>                take the square root of each side

b = +\- sqrt( sg + a^2)


which is the fourth choice.


Thank you,

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