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marina1001
@marina1001
July 2022
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Найдите -2sin а, если cos а=-(корень из 2/2),sin a>0
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sedinalana
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Sina=√(1-cos²a)=√(1-2/4)=√(2/4)=√2/2
-2sina=-2*√2/2=-√2
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amin07am
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Answers & Comments
Verified answer
Sina=√(1-cos²a)=√(1-2/4)=√(2/4)=√2/2-2sina=-2*√2/2=-√2
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