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March 29, 2017

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

  • Trig - ,

    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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