Question

A 25-foot ladder leans against a building so that cos A = 0.12.


What is the value of x?



A.
3 ft

B.
10 ft

C.
29 ft

D.
35 ft
https://static.k12.com/calms_media/media/1422500_1423000/1422781/1/37009b1804d3b698a49e42c3cf055b50224f177a/MS_PA_131002_171229.jpg

Answer 1

If \(\large\rm cos A=0.12\)
Then \(\large\rm cos^{-1}(0.12)=A\)

You'll need to use your calculator to figure out angle A.
That will help you towards finding the length x.

Answer 2

cos A = 0.12-----(1)

cos A = x/25 -----(2) from the figure
(1) = (2)
0.12= x/25

0.12 * 25 = x

simplify it u can get the answer

Answer 3

do u understood

Answer 4

yes i got 3 ft

Answer 5

very good