Question

A 21-foot ladder is leaning against a building. The base of the ladder is 7 feet from the base of the building.

Answer 1

i got 18 degrees

Answer 2

what is to find?

Answer 3

most of the mutiple choice answers seem unlikely

Answer 4

To the nearest degree, what is the measure of the angle that the ladder makes with the ground?

Answer 5

we figure out the cos right

Answer 6

adjacent/ base

Answer 7

cos theta = 3

Answer 8

ya \[\theta = \cos^{-1} 3\]

Answer 9

dang it says error on my calculator

Answer 10

it cannot be calculated
cos lies between 0 and 1

Answer 11

so would i have to do 21/90=7/x

Answer 12

which grade are you in?

Answer 13

12 i messed up in that last post my bad

Answer 14

you need to write the answer as theta = cos^-1 3

Answer 15

we have to fin the answers in degrees from the ground

Answer 16

you need this angle right?

Answer 17

yeast we have the nearest degree for a 21foot ladder with a base of 7

Answer 18

cos-1(3) in the calculator says its error

Answer 19

it cannot be calculated dude!
dont you have learnt that cos lies between 0-1?

Answer 20

i know that why iam stuck but i only have like 4 multiple choice answers

Answer 21

give me that options

Answer 22

18,71,72,67

Answer 23

i think its 18 its my guess

Answer 24

rewrite the whole question as it is again

Answer 25

To the nearest degree, what is the measure of the angle that the ladder makes with the ground?

Answer 26

The figure @Timtime and @miteshchvm you have is correct.
The suggested answer of 18 is not correct.

cos(x) = 7/21 where x is the angle in degrees that the bottom of the ladder makes with the ground.

Cranking that out gives a degree measure that can be entered into the calculator as cos-1(7/21) or cos-1(1/3). The answer is one of those posted above as options as you will see when you do the calculation. Be sure that your calculator is set to degrees and not radians or grads.