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

http://lv.k12.com/mediaFiles/Ninth_Grade/Math/Unit17844/Lesson69375/VHS_PA_S2_04_L310_LQ_Q5.gif

Answer 1

first thing always label your triangle so you can figure out the ratio, note that cos theta is \[\cos \theta = \frac{ adj }{ hyp }\] now you're basically doing the same thing as the last question.