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LedyDi333
@LedyDi333
July 2022
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вычислите с помощью формул приведения:
а) cos 5п\3
б) sin(-11п\6)
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DariosI
Verified answer
А) сos 5π/3= cos (6π-π)/3=cos (6π/3-π/3)=cos(2π-π/3)=cos π/3=1/2
б) sin (-11π/6)=-sin(11π/6)=-sin(12π-π)/6= - sin(12π/6-π/6)=-sin(2π-π/6)=-(-sin π/6)=sin π/6=1/2
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Answers & Comments
Verified answer
А) сos 5π/3= cos (6π-π)/3=cos (6π/3-π/3)=cos(2π-π/3)=cos π/3=1/2б) sin (-11π/6)=-sin(11π/6)=-sin(12π-π)/6= - sin(12π/6-π/6)=-sin(2π-π/6)=-(-sin π/6)=sin π/6=1/2