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Elchin9
@Elchin9
July 2022
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202 номер решите...........
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mathgenius
1) √3/sin(160)+1/cos(200)=√3/sin(180-20)+1/cos(180+20)
sin(180-20)=sin20
cos(180+20)=-cos20
√3/sin(20)-1/cos(20)=(√3*cos(20)-sin20)/cos20 *sin20=
=2*(√3/2*cos20-1/2*sin20)/cos20*sin20=2*sin(40)/1/2*sin(40)=2/1/2=4
Log(2,4)=2
Ответ:2
1 votes
Thanks 2
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Answers & Comments
sin(180-20)=sin20
cos(180+20)=-cos20
√3/sin(20)-1/cos(20)=(√3*cos(20)-sin20)/cos20 *sin20=
=2*(√3/2*cos20-1/2*sin20)/cos20*sin20=2*sin(40)/1/2*sin(40)=2/1/2=4
Log(2,4)=2
Ответ:2