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Rom4ik [11]
4 years ago
11

What is cos(7π5) ? 0.61 -0.61 0.31 -0.31

Mathematics
1 answer:
ArbitrLikvidat [17]4 years ago
6 0

Answer:

-0.31.

Step-by-step explanation:

Cos (7π/5) is in the third quarter so the cosine is negative.

Cos 7π/5) = - cos (7π/5 - π)

= -cos 2π/5)

= -0.31.

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PIT_PIT [208]

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puteri [66]

Answer:

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3 years ago
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8 0
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