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sin(2sin^(-1) 0.8)=...

`sin(2sin^(-1) 0.8)=`

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`sin {2 sin^(-1) (0.8)} = sin {sin^(-1) (2 xx 0.8 sqrt(1 - (0.8)^(2)))}`
`= sin (sin^(-1) 0.96) = 0.96`
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