Matematika Peminatan Sukino Kelas XII
Bab 2 Turunan Fungsi Trigonometri
LKS 2
Soal dan Pembahasan Matematika Sukino Peminatan
Bagian A
6. Jika p(x) = - (cos2 x - sin2 x), maka p '(π/12) = ...
a. - 2,0
b. - 1,5
c. - 1,0
d. - 0,5
e. 1
Jawaban : E
cos2 x - sin2 x = cos 2x
p(x) = - (cos2 x - sin2 x)
p(x) = - cos 2x
p' (x) = - 2 . (- sin 2x)
p' (x) = 2 sin 2x
p' (π/12) = 2 sin 2. (π/12)
p' (π/12) = 2 sin π/6
p' (π/12) = 2 . 1/2
p' (π/12) = 1
>> soal no 7
No comments:
Post a Comment