Answer:α
=
71
°
:
explain:
From trigonometry we have:
cos
α
=
7
21
7
=
21
cos
(
α
)
and:
α
=
a
r
c
cos
(
7
21
)
=
70.5
≈
71
∘
Answer:
You can not solve it because Side P does not exist
Step-by-step explanation:
This is simple proportions, because of their similarity:
