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If A is in quadrant IV, then A/2 is in quadrant II.

Yes, the fact than cos(A) is 0.1 means that A is in quadrant I or IV, but it really is not required in order to answer the question. It is superfluous.

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14y ago
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Q: How do you find the quadrant of A over 2 if cos A equals 1 over 10 and A is located in quadrant IV?
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