Question

A 25-foot ladder is leaning against the side of a house. The top of the ladder is 20 feet above the ground. To the nearest degree, find the angle of elevation between the ground and the ladder.

A) 37°

B) 39°

C) 51°

D) 53°

E) 72°

Answer 1

Evaluate



arcsin (20/25)



Make sure your calculator is in DEGREE mode

Answer 2

@Gdeinward

Answer 3

alright, how do i calculate it

Answer 4

is it E

Answer 5

are you familiar with trig and such?

Answer 6

i used to but i forgotten it

Answer 7

@Gdeinward

Answer 8

well we first must utilize sohcahtoa( sine = opposite/hypotenuse cosine = adjacent/ hypotenuse and tangent = opposite/adjacent

Answer 9

OK

Answer 10

can you figure out what sides we know, to determine which trig function we should use?

Answer 11

25 and 20

Answer 12

leeme rephrase what function should we use, using our known sides

Answer 13

@mhchen

Answer 14

we need touse sine because we are givin the sides opposite and the hypotenuse

Answer 15

20

Answer 16

first divde opposite by the hypotenuse or 20 / 25

Answer 17

then multiply the answer by sine^-1

Answer 18

so your answer is D:
20/25 = 0.8
sine^-1 (0.8) = 53 and some change