СН²=AH*BH
BC=AC*sinA=3 cosA=√(1-0.3²)=√0.91
СН=BC*cosA=3√0.91
BH=AB-AH
AH=x
8.19=x(10-x)
x²-10x+8.19=0 D=√(100-4*8.19)=67.24=8.2²
x1=(10+8.2)/2=9.1
x2=(10-8.2)/2=0.9
AH=9.1см
BH=0.9см
СН²=AH*BH
BC=AC*sinA=3 cosA=√(1-0.3²)=√0.91
СН=BC*cosA=3√0.91
BH=AB-AH
AH=x
8.19=x(10-x)
x²-10x+8.19=0 D=√(100-4*8.19)=67.24=8.2²
x1=(10+8.2)/2=9.1
x2=(10-8.2)/2=0.9
AH=9.1см
BH=0.9см