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If tan x=−1, and 90° < x < 180°, what is cos(x−30°)?
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Apr 23, 2020
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If tan x=−1, and 90° < x < 180°, what is cos(x−30°)?
Mathematics
middle-school
Hesham Yassin
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Hesham Yassin
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Answer:
√2/2
Explanation:
Lunikon
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Apr 28, 2020
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Lunikon
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