Sin inverse(-1/2)+cos inverse(-root3/2)=2pie/3
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★GOOD MORNING★
Sin-¹( Sin ( -π/6 ) ) + Cos-¹( Cos ( π - π/6))
=>
-π/6 + ( π - π/6 )
=>
5π/6 - π/6
=>
4π/6
= 2π/3
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