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Verified answer
Kelas 10 MatematikaBab Trigonometri
cos β = -6/10 = x/r
y = √(r² - x²)
y = √(10² - (-6)²)
y = √(100 - 36)
y = √64
y = 8
sin β = y/r
sin β = 8/10
Cari dulu R nya
R² = 100-36
= 64
R = 8
Sin = 8/10 karna di kuadran 2 sin jadi +