If A = 15 degree , verify that 4 sin 2A cos 4A sin 6A = 1 .
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A=15
so
4sin 2A cos 4A sin 6A
=4sin30 cos 60 sin 90
=4×½×½×1
=4×¼
=1
hence proved
so
4sin 2A cos 4A sin 6A
=4sin30 cos 60 sin 90
=4×½×½×1
=4×¼
=1
hence proved
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