Объяснение:
sin^2 B=1-cos^2 B=1-64/289=225/289, sin B=15/17, sinB=AC/AB, 15/17=3/AB,
AB=3*17/15=3,4, cosB=CB/AB, 8/17=CB/3,4, CB=8*3,4/17=1,6
Объяснение:
sin^2 B=1-cos^2 B=1-64/289=225/289, sin B=15/17, sinB=AC/AB, 15/17=3/AB,
AB=3*17/15=3,4, cosB=CB/AB, 8/17=CB/3,4, CB=8*3,4/17=1,6