Question
Find the value of $'A\ ',$ if $2 \sin 2A = 1$
✓
Answer
$ 2 \sin 2 A =1$
$ \Rightarrow \sin 2 A =\frac{1}{2}$
$ \Rightarrow \sin 2 A =\sin 30^{\circ}$
$ \Rightarrow 2 A =30^{\circ}$
$ \Rightarrow A =15^{\circ} .$
$ \Rightarrow \sin 2 A =\frac{1}{2}$
$ \Rightarrow \sin 2 A =\sin 30^{\circ}$
$ \Rightarrow 2 A =30^{\circ}$
$ \Rightarrow A =15^{\circ} .$
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