. +1 = gsod guisy |o ST - 1] 2 i – InterviewSolution

1.

. +1 = gsod guisy |o ST - 1] 2 i

Answer»

4sin(x)cos(x)+2sin(x)-2cos(x)-1=0

2sin(x)(2cos(x)+1)-1(2cos(x)+1)=0

(2sin(x)-1)(2cos(x)+1)=0

sin(x)=1/2 or cos(x)=-1/2

x=2npi+pi/6 or x=2pi/3,4pi/3,8pi/3 etc

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