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Elle2013
@Elle2013
July 2022
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sedinalana
Verified answer
Cosa=-4/5
sina=-√(1-cos²a)=-√(1-16/25)=-3/5
sin2a=2sinacosa=2*(-3/5)*(-4/5)=24/25
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Answers & Comments
Verified answer
Cosa=-4/5sina=-√(1-cos²a)=-√(1-16/25)=-3/5
sin2a=2sinacosa=2*(-3/5)*(-4/5)=24/25