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sin15 + sin105 =…

 sin150 + sin1050 =

PEMBAHASAN

sin150 + sin1050 = 2 sin ½ (150 + 1050) . cos ½ (150 - 1050)

sin150 + sin1050 = 2 sin ½ (1200) . cos ½ (-900)

sin150 + sin1050 = 2 sin 600 . cos 450

sin150 + sin1050 = 2 . (½ √3) . (½ √2)

sin150 + sin1050 = ½ √6

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