1
NDA Mathematics 4 September 2022
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language
What is tan−1 cot(cosec−1 2) equal to ?
A
$\frac{\pi}{8}$
B
$\frac{\pi}{6}$
C
$\frac{\pi}{4}$
D
$\frac{\pi}{3}$
2
NDA Mathematics 4 September 2022
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language
In a triangle ABC, a = 4, b = 3, c = 2. What is cos 3C equal to ?
A
$\frac{7}{128}$
B
$\frac{11}{128}$
C
$\frac{7}{64}$
D
$\frac{11}{64}$
3
NDA Mathematics 4 September 2022
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language
What is cos 36° − cos 72° equal to ?
A
$\frac{\sqrt{5}}{2}$
B
$−\frac{\sqrt{5}}{2}$
C
$\frac{1}{2}$
D
$−\frac{1}{2}$
4
NDA Mathematics 4 September 2022
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language
If sec x = $\frac{25}{24}$ and x lies in the fourth quadrant, then what is the value of tan x + sin x ?
A
$−\frac{625}{168}$
B
$−\frac{343}{600}$
C
$\frac{625}{168}$
D
$\frac{343}{600}$
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