Turunan : 1. In (sec x + tan x) ? 2. e^{2x} sin 3x ? 3. 2x e^{5k} cos 2x ? Tolong dibantu jawabannya ya kak...

1. y = ln (sec x + tanx)
u = sec x + tan x
u ' = sec x tanx + sec^2x = sec x(tan x + sec x)
y = ln u
y' = 1/u u'
y ' = sec x (tan x + secx)(1/sec x + tanx)
y' = sec x

2. y = e^2x sin 3x
u = e^2x
u' = 2e^2x
v = sin 3x
v' = 3 cos 3x
y' = u'v + uv' = 2e^2x sin 3x + 3 e^2x cos 3x

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Tetap Semangat.
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