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Npgm
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The belief that monetary policy can be effective in changing aggregate demand and that interest rates are the critical monetary
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Answers (3)
(0,1)
2sin(x+y)sin(x-y) = cos2y - cos2x lhs 2(sinx cosy + cosx siny) (sin x cos y – cosx siny) 2( sin^2xcos^2y – sinxcosycosxsiny + sinxcosycosxsiny – cos^2xsin^2y) 2(sin^2xcos^2y – cos^2xsin^2y) 2[(1-cos^2x)cos^2y – (1-cos^2y)cos^2x]
sin2x / 1 - cos2x = cotx 2sinxcosx / 1 - (1-2sin^2x) 2sinxcosx / 2sin^2x cosx/sinx = cotx
