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19 votes
Find the length of side AB

Find the length of side AB-example-1
User Xavier Lowmiller
by
3.3k points

1 Answer

19 votes
19 votes

Answer:

AB = 5.6 cm

Explanation:

Reference angle (θ) = 62°

Hypotenuse = 12 cm

Adjacent = AB

Apply the trigonometric ratio formula, CAH, which is:

Cos θ = Adj/Hyp

Plug in the values

Cos 62° = AB/12

12*Cos 62° = AB

5.63365876 = AB

AB = 5.6 cm (1 decimal place)

User Zelocalhost
by
3.1k points