1
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

If a polygon of n sides has 275 diagonals, then n is equal to

A
25
B
35
C
20
D
15
2
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

If two pairs of lines $$x^2-2mxy-y^2=0$$ and $$x^2-2nxy-y^2=0$$ are such that one of them represents the bisector of the angles between the other, then

A
$$mn=1$$
B
$$m+n=mn$$
C
$$mn=-1$$
D
$$m-n=mn$$
3
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

The distance of the point (1, 2) from the line $$x+y+5=0$$ measured along the line parallel to $$3x-y=7$$ is equal to

A
$$4\sqrt{10}$$
B
$$40$$
C
$$\sqrt{40}$$
D
$$10\sqrt2$$
4
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

The slopes of the lines, which make an angle 45$$^\circ$$ with the line $$3x-y=-5$$, are

A
$$1,-1$$
B
$$\frac{1}{2},-1$$
C
$$1,\frac{1}{2}$$
D
$$-2,\frac{1}{2}$$
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