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y = sin(x)
y’ = cos(x)
y = cos(x)
y’ = -sin(x)
All the trig functions that start with ‘c’:
have negative (-) derivatives
y = ax
y’ = ax * ln(a)
EXAMPLE: y = 2x
y’ = 2x * ln(2)
y = ex
y’ = ex
y = logax
y’ = (1/x) * (1/ln(a))
y = ln(x)
y’ = 1/x