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The angle θ lies in Quadrant I. sinθ=2/5 What is cos θ? −2/5 2/5 (−√21)/(5) (√21)/(5)?

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  • The angle θ lies in Quadrant I. sinθ=2/5 What is cos θ? −2/5 2/5 (−√21)/(5) (√21)/(5)?


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