cos2θ + sin2θ = 1
So, cos2θ = 1 - sin2θ
Caroline S.
asked 08/16/19Sin^2 theta-cos^2theta =sin^2 theta-(1-(_________))=2sin^2 theta -1
cos2θ + sin2θ = 1
So, cos2θ = 1 - sin2θ
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