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Vera_Pavlovna [14]
3 years ago
10

If sin∠X = cos∠Y and m∠X = 72°, what is the measure of ∠Y?

Mathematics
2 answers:
Nastasia [14]3 years ago
6 0

Answer:

The answer is 18.

Step-by-step explanation:

90-72=18

dezoksy [38]3 years ago
3 0

Answer:

A. 18°

Step-by-step explanation:

Using the cofunction identity

sin x = cos(90 - x)

Hence

sin72° = cos(90 - 72)° = cos18° ⇒ ∠Y = 18°

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