16sin .cos. cos2. cos4 .cos8
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Answer:
=8*2sincos.cos2.cos4.cos8
=8.sin(2*1)cos2.cos4.cos8
=4*2sin2cos2.cos4.cos8
=4sin(2*2).cos4.cos8
=2*2sin4cos4.cos8
=2sin(2*4).cos8
=2sin8cos8
=sin(2*8)
=sin16
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