Jawabanmu

2014-04-04T22:00:04+07:00
Buktikan
sin^6 A + cos^6 A = 1 - 3 sin^2 A cos^2 A
sin^6 A + cos^6 A = (sin^2 A + cos^2 A)^3 - 3 sin^2 cos^2 (sin^2 + cos^2)
sin^6 A + cos^6 A = 1 - 3 sin^2 cos^2
terbukti :)