Question

Tolong JAWAb Soal nomer 23,25,27 pake caranya yg jelas yaa. makasih

Answer 1

23.

f(x) = cos (2x + 30°)

naik → f'(x) > 0

f'(x) > 0

-2 sin (2x + 30°) > 0

sin (2x + 30°) < 0

180° < 2x + 30° < 360°

150° < 2x < 330°

75° < x < 165° → jawaban

25.

y = 2 cos (2x + π/6)

Uji titik (π,√3)

y = 2 cos (2π + π/6)

y = 2 × 1/2 √3

y = √3

titik pd kurva

m = y' = -4 sin (2x + π/6)

x = π

m = -4 sin (2π + π/6)

m = -4 × 1/2

m = -2