February 2019 1 24 Report
Soal dari buku paket matematika(peminatan) kelas 12mipa k13 masmedia hal 224

Buktikan operasi trigonometri ini
1. sin (180°+a°) = -sin a°
2. sin (270°+a°) = -cos a°
3. sin(p+q) per cos p cos q = tan p + tan q
4. sin (p-q) per cos p cos q = tan p - tan q
5. sin (α+β) sin (α-β) = sin²α-sin2β
6. cos (α+β) . cos (α-β) = (cos²α+cos²β)-1

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