Which of the following real valued functions is/are not even functions?
f(x) = x - [x], where [x] denotes the greatest integer less than or equal to x.
Number of solutions of the equation tan(x) + sec(x) = 2cos(x), x [0, ] is
0
1
2
3
C.
2
Let p, q and r be the sides opposite to the angles P, Q and R, respectively in a PQR. If r2sin(P)sin(Q) = pq, then the triangle is
equilateral
acute angled but not equilateral
obtuse angled
right angled