(cos(x) + 4 sin(x)) (cos(x) - 2sin(x)) = 0
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Answer:
(cos(x) + 4 sin(x)) (cos(x) - 2sin(x)) = 0
Step-by-step explanation:
=cos^2(x)-2sinxcosx+4sinxcosx-8sin^2(x)
=cos^2(x)+2sinxcosx-8sin^2(x)
=sin2x+cos2x-7sin^2(x)
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