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March 24, 2017

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1.Using exact values, verify that
cos 60°=1-2 sin² 30°

  • Trigonometry - ,

    I am not certain what I am seeing.
    Is it

    cos^2 60=1-2sin^2 30 ?
    3/4=?=1-2*1/4
    so it doesn't verify...so I must not be seeing the type clearly

  • Trigonometry - ,

    This is exacly how the question goes, This is a test question.

    1.Using exact values, verify that
    cos 60°=1-2 sin² 30°

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