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Guf08
@Guf08
August 2022
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Найти значение выражения 1)4cos(-pi+beta)+2sin(-3pi/2+beta),если соs beta=-1/2; 2)2sin(a+2pi)+3cos(-3pi/2+a),если sina=-0,7
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sedinalana
1
4cos(-π+b)+2sin(-3π/2+b)=-4cosb+2cosb=-2cosb=-2*(-1/2)=1
2
2sin(a+2π)+3cos(-3π/2+a)=2sina-3sina=-sina=-(-0,7)=0,7
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Answers & Comments
4cos(-π+b)+2sin(-3π/2+b)=-4cosb+2cosb=-2cosb=-2*(-1/2)=1
2
2sin(a+2π)+3cos(-3π/2+a)=2sina-3sina=-sina=-(-0,7)=0,7