Sh Show that :sin 90°=2 cos 45°sin 45°
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L.H.S.=sin90°=2cos45°sin45°
=> 1=2*1/√2*1/√2
=>1=2*1/2
=>1=1=R.H.S.
=> 1=2*1/√2*1/√2
=>1=2*1/2
=>1=1=R.H.S.
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