Question
sin 2A = 2 sin A is true when A =
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Answer
sin 2A = 2 sin A is true when A =${0^ \circ }$
$\because $$\sin {\text{2A}} = 2\sin {\text{A}}$
$ \Rightarrow $$\sin \left( {2 \times {0^ \circ }} \right) = \sin {0^ \circ }$
$ \Rightarrow $$\sin {0^ \circ } = \sin {0^ \circ }$
$\because $$\sin {\text{2A}} = 2\sin {\text{A}}$
$ \Rightarrow $$\sin \left( {2 \times {0^ \circ }} \right) = \sin {0^ \circ }$
$ \Rightarrow $$\sin {0^ \circ } = \sin {0^ \circ }$
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