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11111nata11111 [884]
3 years ago
11

Havana was born on February 14, 1987. How old was she on her birthday in 2002?

Mathematics
2 answers:
nekit [7.7K]3 years ago
4 0
Havana would be 15 years old
777dan777 [17]3 years ago
4 0

Answer:

15

Step-by-step explanation:

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\cos(\alpha+\beta)=\cos\alpha\cdot\cos\beta-\sin\alpha\cdot\sin\beta

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If you use those identities, for \alpha=x,\ \beta=\dfrac{\pi}{2}, you get:

\sin\left(x+\dfrac{\pi}{2}\right) = \sin x\cdot\cos\dfrac{\pi}{2} + \cos x\cdot\sin\dfrac{\pi}{2} = \sin x\cdot0 + \cos x \cdot 1 = \cos x

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Answer:

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Step-by-step explanation:

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