Помогите срочно пожалуйста!! Решить 2 примера!!!!. Created by KatyaZheleznyak. algebra-ru

Помогите срочно пожалуйста!! Решить 2 примера!!!!...

amin07am

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sedinalana

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(3sina-5cosa+2)/(sina+3cosa+6)=1/3
9sina-15cosa+6=sina+3cosa+6
9sina-sina-3cosa+6+15cosa-6
8sina=18cosa
sina=9cosa/4
tga=sina/cosa
tga=9cosa/4cosa
tga=9/4
tga=2,25

(1-log(2)12)(1-log(6)12)=
(1-log(2)4-log(2)3)(1-(log(2)4+log(2)3)/(log(2)2+log(2)3)=
=-(1+log(2)3)*(1+log(2)3-2-log(2)3/(1+log(2)3)=-(-1)=1

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