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6costheta+8sintheta=9, when tan53^(@)8^(...

`6costheta+8sintheta=9`, when `tan53^(@)8^(')=4/3` and `cos25^(@)50^(')=9/10`

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`theta=2npi+78^(@)58^('), theta=2npi+27^(@)18^(')`
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