Find the length of side AB Give your answer to 1 decimal place

Question

asked Mar 17, 2021 140k views

1 Answer

Erictgrubaugh · Answer 1 · 2021-03-23T18:19:06+0000

Answer:

First to find AB we use cosine

cos ∅ = Adjacent / hypotenuse

AB is the adjacent

BC is the hypotenuse

cos ∅ = AB/AC

cos 70 = AB / 8

AB = 8 cos 70°

AB = 2.736

AB = 2.7cm to one decimal place

Hope this helps