Question

A 30-foot ladder leans against a building. If cos B = 0.2, what is the value of x?


A. 2 ft
B. 4 ft
C. 6 ft
D. 8 ft

Answer 1

I am thinking it's D. 8

Answer 2

what ratio is cosine (talking about what side over what side)?

Answer 3

and looking at the angle B

Answer 4

Hmm

Answer 5

you know like
sin is opp/hyp
tan is opp/adj

cos is?

Answer 6

Hold on it's on the tip of my tongue

Answer 7

sohcahtoa
some people like to memorize this to help them to remember the definitions

Answer 8

is it opp/hyp??

Answer 9

that is sin

Answer 10

Right

Answer 11

Hm I can't remember

Answer 12

So it would have been impossible for you to do this question without knowing the trig ratios.

Answer 13

cos is adj/hyp

Answer 14

looking at our triangle with is adjacent to B
?

Answer 15

what not with

Answer 16

what side is adjacent to B?
aka touching the angle