Posted by **Nathan** on Sunday, May 22, 2011 at 5:35pm.

How do I find the quadrant in which angle thada may lie if cos thada > 0 and tan thada < 0?

- Trig -
**Henry**, Sunday, May 22, 2011 at 7:38pm
cos(theta)>0 in Q1, and Q4.

tan(theta)<0 in Q2, and Q4.

Q4 satisfies both conditions. Therefore, angle theta lies in Q4.

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