1
NDA Mathematics 1st September 2024
MCQ (Single Correct Answer)
+2.5
-0.833
Change Language
In a triangle ABC $\rm \frac{a}{\cos A}=\frac{b}{\cos B}=\frac{c}{\cos C}$ What is the area of the triangle if a = 6 cm?
1
9√3 square cm 
2
12 square cm 
3
18√3 square cm 
4
24 square cm 
2
NDA Mathematics 1st September 2024
MCQ (Single Correct Answer)
+2.5
-0.833
Change Language

In a triangle ABC, ∠A = 75° and ∠B = 45°. What is 2a - b equal to?

1
c
2
√2c
3
2c
4
2√2c
3
NDA Mathematics 1st September 2024
MCQ (Single Correct Answer)
+2.5
-0.833
Change Language
In a triangle ABC tan A + tan B + tan C = k  What is the value of cot A cot B cot C? 
1
0.5 k
2
1/k
3
3/k
4
1/k3
4
NDA Mathematics 21 April 2024
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language

$ABC$ is a triangle such that angle $C = 60^{\circ}$, then what is $\frac{\cos A + \cos B}{\cos \left(\frac{A - B}{2}\right)}$ equal to?

A

2

B

$\sqrt{2}$

C

1

D

$\frac{1}{\sqrt{2}}$

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