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pls help

1 Here, AB is the hypotenuse and BC is the opposite side

So....the trig function that relates opp/hyp = cosine

So

cos (22°) = BC / 18 multiply both sides by 18

18 *cos (22°) = BC ≈ 16.7

P.S. - drawing a picture might help you with these, Cerenetie

2

We know the side adjacent to the angle = 6

And we are looking for the hypotenuse = board length

The trig function that relates the adjacent and hypotenuse is the cosine

cos (55°) = 6 / hyp rearrange as

hyp = 6 / cos (55°) ≈ 10.5 ft