Answer:
hypotheneus = - 20. 4
Step-by-step explanation:
to evaluate for the length of side BC , using SOH CAH TOA
given angle Ф = 71°
adjacent = 6.3cm
hypotenus = ?
find the hypothenus side using CAH
cosФ = Adjacenct /hypotheneus
cos 71 = 6.3cm/hypotheneus
cross multtiply
cos 71 x hypotheneus = 6.3cm
-0.309 hypotheneus = 6.3cm
divide both sides by- 0.3
-0.309 hypotheneus/-0.3 = 6.3/-0.309
hypotheneus = - 20.388
hypotheneus = - 20. 4
