Question

If r=12 and t=20, find S.

Answer 1

d. 53.1

Explanation:

this is the correct answer on ed-genuity, hope this helps! :)

Answer 2

d. 53.1°

Explanation:

The mnemonic SOH CAH TOA reminds you ...

Cos = Adjacent/Hypotenuse

You are given the lengths of t (hypotenuse) and r (adjacent to S), so you can find the angle from ...

cos(S) = r/t = 12/20

S = arccos(12/20) ≈ 53.1° . . . . . use the inverse cosine function