Turunan pertama dari f(x) = sin (2x + 1) + cos (x – 1) adalah​

Jawaban:

y = sin x

dy/dx = cos x

y = cos x

dy/dx = -sin x

f(x) = sin (2x + 1) + cos (x – 1)

df(x)/dx = 2 . cos (2x + 1) + 1 . (-sin (x – 1))

= 2 cos (2x + 1) – sin (x – 1)