Question

202 номер решите...........

Answer 1

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