Answer:
The angle with measure 60° is one of those angles that has a well-known cosine value: cos(60°) its C= 1/2.
Step-by-step explanation:
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P(D) = 0.3
P(A) = 0.5
P(D|A) = 0.6
P(D) = P(A) * P(D|A)
P(D) = 0.5 * 0.6 = 0.3