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Verified answer
Penyelesaian:=
= 3x + 2cosx ] π->π/2
= (3π + 2cosπ) - (3(π/2) + 2cos(π/2))
= (3π -2) - (3π/2 + 0)
= 3π/2 - 2 - 3π/2
= -2