Test Index

UPSC NDA I 2012 Mathematics Paper

Show Para Hide Para

For the next Two (2) questions that follow:

The equation formed by multiplying each root of

a x^2+b x

+c=0

by 2 is

x^2+36 x+24=0

.

© examsnet.com

Question : 24 of 120

Marks: +1, -0

Which one of the following is correct?

$bc=a^2$
$bc=36a^2$
$bc=72a^2$
$bc=108a^2$

Solution:

b=18a

c=6a

For the next Three (3) questions that follow:

Let

\sin \;(A+B)=1

and

\sin \;(A-B)=\;\frac{1}{2}

,

where

A, B \in \left[0, \;\frac{\pi}{2}\right]

© examsnet.com

Go to Question:

Prev Question

Next Question