Solve for a
a=\frac{\theta }{\sin(\frac{4}{5})}
Solve for θ
\theta =\sin(\frac{4}{5})a
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a\sin(\frac{4}{5})=\theta
Swap sides so that all variable terms are on the left hand side.
\sin(\frac{4}{5})a=\theta
The equation is in standard form.
\frac{\sin(\frac{4}{5})a}{\sin(\frac{4}{5})}=\frac{\theta }{\sin(\frac{4}{5})}
Divide both sides by \sin(\frac{4}{5}).
a=\frac{\theta }{\sin(\frac{4}{5})}
Dividing by \sin(\frac{4}{5}) undoes the multiplication by \sin(\frac{4}{5}).
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