Question

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1. sin(−120°) + cos 225° − cos(−30°)

2. f(x) = 3x¹² , f'(x) =

rules :
1. gunakan cara
2. jangan ngasal
3. dilarang meminta BA

Terimakasih^^​

Answer 1

SOAL 1

sin(-120°)

= -sin 120°

= -1/2 √3

cos 225°

= -1/2 √2

cos(-30°)

= -cos 30°

= -1/2 √3

sin(-120°) + cos 225° − cos(−30°)

= -1/2 √3 + (-1/2 √2) - (-1/2 √3)

= -1/2 √3 + (-1/2 √2) + 1/2 √3

= (-1/2 √3 + 1/2 √3) + (-1/2 √2)

= -1/2 √2

SOAL 2

f(x) = 3x¹²

___________

f'(x) = 3(12)x¹² - ¹

f'(x) = 36x¹¹

UwU