(c) If
X=15°, evaluate:8 sin 2x cos 4x sin 6x
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Answer:
= 8sin 2(15) .cos 4(15) .sin 6(15)
= 8 sin 30 .cos 60 .sin 90
= 8(1\2) .(1\2) .(1)
=(4)(1\2)(1)
=2
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