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= sin 30 cos 45 + cos 30 sin 45
= 1/2 (1/2 akar 2) + 1/2 akar 3 (1/2 akar 2)
= 1/4 akar 2 + 1/4 akar 6
= 1/4 (akar 2 + akar 6)
atau ubah langsung ke desimal