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kabirova1
@kabirova1
July 2022
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tg (x-20°)+tg(70°-x)=2
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BOR48
Tq(x-20°) +tq(70° -x) =2 ;
tq(x-20°) +tq
(
90 -(x -20°)
)
=2 ;
tq(x-20°) + tq(x-20°) =2 ;
tq(x-20°) + 1/tq(x-20°) =2 ; * * * a+1/a≥ 2 , a >0 * * *
(tq(x-20°) -1)² / tq(x-20°) =0 ;
tq(x-20°) =1 ;
x-20° =45° +180°*k ,k ∈Z. * * * x -π/9 =π/4+π*k ,k∈Z. * * *
x =65° +180°k , k ∈Z .⇔
x =13π/36 +π*k ,k∈Z
.
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Answers & Comments
tq(x-20°) +tq(90 -(x -20°)) =2 ;
tq(x-20°) + tq(x-20°) =2 ;
tq(x-20°) + 1/tq(x-20°) =2 ; * * * a+1/a≥ 2 , a >0 * * *
(tq(x-20°) -1)² / tq(x-20°) =0 ;
tq(x-20°) =1 ;
x-20° =45° +180°*k ,k ∈Z. * * * x -π/9 =π/4+π*k ,k∈Z. * * *
x =65° +180°k , k ∈Z .⇔ x =13π/36 +π*k ,k∈Z .