sin 50-sin 70+sin 10
Matematika
AgungAfandyGhairil
Pertanyaan
sin 50-sin 70+sin 10
1 Jawaban
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1. Jawaban JijiJerapah
sin 50 - sin 70 + sin 10
= 2 cos (50+70/2) x sin (50-70/2) + sin 10
= 2 cos 60 x sin (-10) + sin 10
= 2 x 1/2 x -sin 10 + sin 10
= -sin 10 + sin 10
= 0