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Posted by on Thursday, June 10, 2010 at 9:58pm.

Is the answer to: cosθ, if tanθ = 1 and 180° < θ < 270° ; (√ 2)/2 ?

  • Algebra 2 - , Thursday, June 10, 2010 at 11:28pm

    close, but remember that in the third quadrant the cosine is negative, so

    cosØ = -√2/2

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