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iriska1392
@iriska1392
August 2022
1
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решите пожалуйста. не получается((
в третьем должно получиться 0
а в четвертом 7/6
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sedinalana
3
sinπ*cos3π/2+1/cos2π+1/sin(-3π/2)=0*0+1/1+1/(-1)=0+1-1=0
4
sin²45/cos²30+sin²30/cos²45=1/2:3/4+1/4:1/2=1/2*4/3+1/4*2=2/3+1/2=
=4/6+3/6=7/6
1 votes
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Answers & Comments
sinπ*cos3π/2+1/cos2π+1/sin(-3π/2)=0*0+1/1+1/(-1)=0+1-1=0
4
sin²45/cos²30+sin²30/cos²45=1/2:3/4+1/4:1/2=1/2*4/3+1/4*2=2/3+1/2=
=4/6+3/6=7/6