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f() = sin 2()
= sin 2()
= sin 90
= 1
f() = sin 2()
= sin 2()
= sin 330
= - sin 30
= -
Jadi:
f() - f()
= 1 - ( - )
= 1 +
= 1,5
Kalo gasalah sih kaya gituu, Maaf yaa kalau salah :D