AP ICET 2012
Instructions
For the following questions answer them individually
Question 132
If $$A = \left(\begin{array}{c}0 & -2\\ 2 & 0\end{array}\right)$$ and $$B = \left(\begin{array}{c}1 & 0\\ 0 & -1\end{array}\right)$$, then AB + BA =
Question 133
If A, B are square matrices of same order such that $$B = -A^{-1} BA$$, then $$(A + B)^2 =$$
Question 138
In the figure below if $$\angle ABC = \angle BDC = 90^\circ, BD = AD$$, then $$\angle BCD = $$
Question 139
If two circles of radii 5 em and 12 em touch each other externally, then the distance between their centres (in centimetres) is
Question 140
The area (in square units) of the polygon whose vertices taken in order are (0, 0), (6,0), (6, 6), (4, 4) and (0, 6) is
