Answer
$\tan 79.1$
Work Step by Step
$\dfrac {\sin 158.2}{1+\cos 158.2}=\dfrac {2\sin \dfrac {158.2}{2}\times \cos \dfrac {158.2}{2}}{2\cos ^{2}\dfrac {1582}{2}}=\tan \dfrac {158.2}{2}=\tan 79.1$
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