Find the inverse of each of the matrices , if it exists.
If the points (−2,0),(−1,31) and (cosθ,sinθ) are collinear, then the number of values of θ ∈[0,2π] :
If where r = 1,2,3 be the co-ordinates of the points A, B, C respectively, then prove the following:
The equation of internal bisector of angel A is
b ∣∣xx1x2yy1y2 111∣∣+c∣∣xx1 x3yy1y3111∣∣=0
where b = AC and c = AB.