@colzart14
JAWABANNYA : B
D
dicoba satu-satu aja hehehe
JAWABANNYA : C
r2 ( tan2C + tan2B - 2 tanB tanC cosA ) = r2 ( sec2C + sec2B - 2 secB secC cosA ) → r2 di coret sec2x = 1+tan2x secx = 1/cosx tanx=sinx/cosx tan2...