1
NDA 2019 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
What is tan25$$^\circ$$ tan15$$^\circ$$ + tan15$$^\circ$$ tan50$$^\circ$$ + tan25$$^\circ$$ tan50$$^\circ$$ equal to?
A
0
B
1
C
2
D
4
2
NDA 2019 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
What is $$\cot A + \cos ecA$$ equal to?
A
$$\tan \left( {{A \over 2}} \right)$$
B
$$\cot \left( {{A \over 2}} \right)$$
C
2$$\tan \left( {{A \over 2}} \right)$$
D
2$$\cot \left( {{A \over 2}} \right)$$
3
NDA 2019 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
What is $$\cot \left( {{A \over 2}} \right)$$ $$-$$ $$\tan \left( {{A \over 2}} \right)$$ equal to?
A
tan A
B
cot A
C
2 tan A
D
2 cot A
4
NDA 2019 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
If angle C of a triangle ABC is a right angle, then what is tan A + tan B equal to?
A
$${{{a^2} - {b^2}} \over {ab}}$$
B
$${{{a^2}} \over {bc}}$$
C
$${{{b^2}} \over {ca}}$$
D
$${{{c^2}} \over {ab}}$$
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