A(1; 2), B(-2; -3)
1)x-x1/x2-x1 = y-y1/y2-y1
x-1/-2-1 = y-2/-3-2
x-1/-3 = y-2/-5
x-1/3 = y-2/5
3(y-2) = 5(x-1)
3y-6 = 5x-5
3y-5x-6+5 = 0
3y-5x-1 = 0
3y = 5x+1
y = 5/3x + 1/3
5x = 3y-1
x = 3/5y - 1/5
2)Угол с осью OX:
<a = arctg(5/3)
Угол с осью OY:
<b = arctg(3/5)
3)O(0; 0)
d(O; AB) = |Ax0+By0+C|/√A²+B² = |-5•0+3•0-1|/√25+9 = 1/√34 = √34/34
A(1; 2), B(-2; -3)
1)x-x1/x2-x1 = y-y1/y2-y1
x-1/-2-1 = y-2/-3-2
x-1/-3 = y-2/-5
x-1/3 = y-2/5
3(y-2) = 5(x-1)
3y-6 = 5x-5
3y-5x-6+5 = 0
3y-5x-1 = 0
3y = 5x+1
y = 5/3x + 1/3
5x = 3y-1
x = 3/5y - 1/5
2)Угол с осью OX:
<a = arctg(5/3)
Угол с осью OY:
<b = arctg(3/5)
3)O(0; 0)
d(O; AB) = |Ax0+By0+C|/√A²+B² = |-5•0+3•0-1|/√25+9 = 1/√34 = √34/34