is divisible by 3.
21. a) Find the equation of tangents to the circle x²+y=25 drawn through th
point (13,0).
b) If three sides of a triangle are proportional to 2:√6:3+1, find the
angles.
[2
c) Find the area of a triangle formed by the points whose position vectom
are 2-j+3,7-1-2 and 7+2j+3K