If and where, is an obtuse angle, then is equal to
B.
A man is standing on the horizontal plane. The angle of elevation of top of the pole is . If he walks a distance double the height of the pole, then the elevation of the pole is . The value of is
The least value of a, for which the function a has at east one solution in the interval , is
9
4
5
1
If sin(a) and cos(a) are the roots of the equation ax2 + bx + c = 0, then
a2 - b2 + 2ac = 0
(a - c)2 = b2 + c2
a2 + b2 - 2ac = 0
a2 + b2 + 2ac = 0
In , if cot(A), cot(B) and cot(C) are in AP, then a2, b2 and c2 are in
HP
AP
GP
None of the above
If , where are the angles made by a line with the positive directions of the axes of reference, then the measure of is