Question
Find the value of $'A\ ',$ if $\cot 3A = 1$
✓
Answer
$\cot 3A = 1$
$\Rightarrow \cot 3A = \cot 45^\circ $
$\Rightarrow 3A = 45^\circ $
$\Rightarrow A = 15^\circ .$
$\Rightarrow \cot 3A = \cot 45^\circ $
$\Rightarrow 3A = 45^\circ $
$\Rightarrow A = 15^\circ .$
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