Correct Answer: Karambir Singh

Solution : The correct answer is Karambir Singh.

The Chief of the Naval Staff of India as of June 30, 2020, was Karambir Singh. The Chief of the Naval Staff is the head of the military staff of the Indian Navy. He was the Chief

Correct Answer: 23

Solution : $23\operatorname{cosec}^2 A-23\cot^2A$
= $23(\operatorname{cosec}^2 A-\cot^2A)$
= $23$ [As $\operatorname{cosec}^2 A-\cot^2A=1$]
Hence, the correct answer is 23.

Correct Answer: Ascaris

Solution : The correct answer is Ascaris.

Ascaris is a roundworm. Ascaris lumbricoides, commonly known as the large intestinal roundworm, infects the human gastrointestinal tract. It is one of the most prevalent parasitic worms in humans, causing the medical condition ascariasis. Unlike flatworms such as Planaria, liver

Correct Answer: Birds

Solution : The correct answer is Birds.

The coppersmith barbet (Psilopogon Haemacephalus), also known as the crimson-breasted barbet or coppersmith, is an Asian barbet with a red forehead and throat that is recognised for its metronomic call, which resembles the sound of a coppersmith hammering metal.

Correct Answer: Abraham Lincoln

Solution : The correct answer is Abraham Lincoln

According to Abraham Lincoln, democracy is a government of the people, for the people and by the people. It is the most famous definition of democracy given by Abraham Lincoln. In a democracy, the people choose their

Correct Answer: $\frac{b}{\cot \beta-\cot \alpha}$

Solution :
Let the height of the pole be $h$ cm.
$PQ = b$
In $\triangle ABQ$
⇒ $\tan \beta = \frac{AB}{BQ}$
⇒ $\tan \beta = \frac{h}{BQ}$
⇒ $BQ = \frac{h}{\tan \beta}$
⇒ $BQ = h \cot \beta$
In $\triangle ABP$
⇒ $\tan \alpha =

Correct Answer: $\frac{\sqrt{3}}{4}$

Solution :
Let the aeroplane be at point A at a height $h$ above ground level.
Let B and C be two consecutive kilometre stones with angles of depression $60°$ and $30°$, respectively.
Now, $\tan 60°=\frac{h}{BD}$ and $\tan 30°=\frac{h}{CD}$
⇒ $BD=h\cot 60°$ and $CD=h\cot 30°$
$\because BD+CD=1$

Correct Answer: badminton

Solution : The correct answer is Badminton.

Lakshya Sen is a badminton player. He is a former world junior no. 1. He won gold medals at the 2018 Asian Junior Championship in the boys' singles and at the Summer Youth Olympics in the mixed event. He

Correct Answer: 1

Solution : The error lies in the first part of the sentence.

The phrase "were living" should be replaced with "lived" to convey the intended meaning. 
The sentence discusses a past action, and the past continuous tense "were living" suggests ongoing or continuous action in the past

Correct Answer: $-1$

Solution : Given: $\tan ^2 48^{\circ}-\operatorname{cosec}^2 42^{\circ}+\operatorname{cosec}\left(67^{\circ}+\theta\right)-\sec \left(23^{\circ}-\theta\right)$
= $\tan ^2 48^{\circ}-\sec^2 (90^{\circ}-42^{\circ})+\sec(90^{\circ}-(67^{\circ}+\theta))-\sec \left(23^{\circ}-\theta\right)$
= $\tan ^2 48^{\circ}-\sec^2 48^{\circ}+\sec(23^{\circ}-\theta)-\sec \left(23^{\circ}-\theta\right)$
= $-1$
Hence, the correct answer is $-1$.