Given that cosine theta = -1/2 and theta is obtuse find sin4theta

Question

asked Sep 24, 2021 38.2k views

1 Answer

Ekstroem · Answer 1 · 2021-09-29T20:50:24+0000

Answer:

0.8660

Explanation:

cosine theta = -1/2

theta = cosinearctan(-0.5)

theta = 120

sine4theta = sine 4(120)

= sine480

= 0.8660