Answer:
B (1,0)
Step-by-step explanation:
Answer:
AC = 18
Step-by-step explanation:
Using the cosine ratio in the right triangle and the exact value
cos30° =
, then
cos30° =
=
=
=
( cross- multiply )
2 AC = 12
×
= 12 × 3 = 36 ( divide both sides by 2 )
AC = 18