Answer :

AL2006

The angle whose sin is 0.78 is either 51.26 degrees or 128.74 degrees.
(rounded)

There's no simple way to calculate this.  You just have to look it up in a book
or punch it into your calculator.
sin (x)=0.78

x=[tex]sin^{-1} (0.78)[/tex]

x= 51.26°   or     180°- 51.26°= 128.74°

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