1
NDA Mathematics 16 April 2023
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language

Consider the following for the next two (02) items that follow :

Given that m(θ) = cot2θ + n2tan2θ + 2n, where n is a fixed positive real number. 

Under what condition does m attain the least value ? 
A
n = tan2θ
B
n = cot2θ
C
n = sin2θ
D
n = cos2θ
2
NDA Mathematics 16 April 2023
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language
If f(x) = x(4x2 - 3), then what is f(sinθ) equal to ?  
A
-sin3θ
B
-cos3θ
C
sin3θ
D
-sin4θ
3
NDA Mathematics 4 September 2022
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language
What is the value of cosec$\left(−\frac{73 \pi}{3}\right)$ ?
A
$\frac{2}{\sqrt{3}}$
B
$−\frac{2}{\sqrt{3}}$
C
2
D
−2
4
NDA Mathematics 4 September 2022
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language
What is the value of $\cos \left(\frac{5 \pi}{17}\right)+\cos \left(\frac{7 \pi}{17}\right)+2 \cos \left(\frac{11 \pi}{17}\right) \cos \left(\frac{\pi}{17}\right)$ ?
A
0
B
1
C
4 cos$\left(\frac{6 \pi}{17}\right)$ cos$\left(\frac{\pi}{17}\right)$
D
4 cos$\left(\frac{11 \pi}{17}\right)$ cos$\left(\frac{\pi}{17}\right)$
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