1
NDA Mathematics 14 November 2021
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language
If $\rm \int \sqrt{1 - sin 2x} \space dx$ = A sinx + B cosx + C, where 0 < x < $\frac{\pi}{4}$, then which one of the following is correct?
A
A + B = 0
B
A + B - 2 = 0
C
A + B + 2 = 0
D
A + B - 1 = 0
2
NDA Mathematics 14 November 2021
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language
What is $\rm \int \frac{dx}{x(x^2 + 1)}$ equal to?
A
$\rm \frac{1}{2}ln\left(\frac{x^2}{x^2 + 1}\right) + C$
B
$\rm ln\left(\frac{x^2}{x^2 + 1}\right) + C$
C
$\rm \frac{3}{2}ln\left(\frac{x^2}{x^2 + 1}\right) + C$
D
$\rm \frac{1}{2}ln\left(\frac{x^2+1}{x^2}\right) + C$
3
NDA Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language
What is $\rm \int e^{\left(2\ln x+\ln x^2\right)}dx$ equal to?
A
$\rm \frac{x^4}{4}+c$
B
$\rm \frac{x^3}{3}+c$
C
$\rm \frac{2x^5}{5}+c$
D
$\rm \frac{x^5}{5}+c$
4
NDA Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language

What is $\rm \int \frac{dx}{\sec x+\tan x}$ equal to?

A
ln (sec x) + ln |sec x + tan x| + c
B
ln (sec x) - ln |sec x + tan x| + c
C
sec x tan x - ln |sec x - tan x| + c
D
ln |sec x + tan x| - ln |sec x| + c
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