Question

$hey find \: the \: answer \: in \: steps$

plzz help
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Answer 1

Answer:

$here \: is \: your \: answer...$

sin of an angle is positive in first and second quadrants.

$= > sin ^{ - 1} (sin \: 160 ^{0})$

$= > sin ^{ - 1}(sin(180 - 20)^ {0})$

$= > sin ^{ - 1} (sin \: 20 ^{0} )$

$= 20^{0}$

Hence, option iv) 20° is correct

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