Answer:
∠ p ≈ 59°
Explanation:
Using Pythagoras' identity in right triangle ABD to find DB
DB² = 5² + 6² = 25 + 36 = 61 ( take square root of both sides )
DB =

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Using the cosine ratio in right triangle DBC
cos p =
=
=
, thus
p =
(
) ≈ 59°