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Staff Selection Commission Combined Graduate Level Exam

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Question : Evaluate the following:$\sqrt{2+\sqrt{2+\sqrt{2+2\cos8\theta}}}$

Option 1: $2 \cos \theta$

Option 2: $2 \cos 2 \theta$

Option 3: $\sin 2 \theta$

Option 4: $\cos 2 \theta$

Team Careers360 23rd Jan, 2024

Correct Answer: $2 \cos \theta$


Solution : We know, $\cos2\theta= 2\cos^2\theta-1$
⇒ $\cos2\theta+1= 2\cos^2\theta$
Putting $\theta=4\theta$ on both sides, we get
$\therefore \cos8\theta+1=2\cos^24\theta$
Given, $\sqrt{2+\sqrt{2+\sqrt{2+2\cos8\theta}}}$
= $\sqrt{2+\sqrt{2+\sqrt{2(1+\cos8\theta)}}}$
= $\sqrt{2+\sqrt{2+\sqrt{2(2\cos^24\theta)}}}$
= $\sqrt{2+\sqrt{2+2\cos4\theta}}$
= $\sqrt{2+\sqrt{2(1+\cos4\theta)}}$
= $\sqrt{2+\sqrt{2(2\cos^22\theta))}}$
= $\sqrt{2+2\cos2\theta}$
= $\sqrt{2(1+\cos2\theta)}$
= $\sqrt{2(2\cos^2\theta)}$
= $2 \cos \theta$
Hence, the correct answer is

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Question : A sum of Rs. 730 was divided among A, B and C in such a way that if A gets Rs. 3, then B gets Rs. 4. And if B gets Rs. 3.50, then C gets Rs. 3. The share of B exceeds that of C by:

Option 1: Rs. 30

Option 2: Rs. 40

Option 3: Rs. 70

Option 4: Rs. 210

Team Careers360 22nd Jan, 2024

Correct Answer: Rs. 40


Solution : Given: A sum of Rs. 730 was divided among A, B and C in such a way that if A gets Rs. 3, then B gets Rs. 4. And if B gets Rs. 3.50, then C gets Rs. 3.
So,  A : B =

20 Views

Question : The value of $(\cos 53° – \sin 37°)$ is:

Option 1: $0$

Option 2: $1$

Option 3: $2 \sin 37°$

Option 4: $2 \cos 53°$

Team Careers360 25th Jan, 2024

Correct Answer: $0$


Solution : Given:
$(\cos 53° – \sin 37°)$
$= \cos (90°– 37°) – \sin 37°$
$= \sin 37°– \sin 37°$
$= 0$
Hence, the correct answer is 0.

17 Views

Question : In which of the following states Vidhan Sabha elections was not held in 2022?

Option 1: Haryana

Option 2: Goa

Option 3: Punjab

Option 4: Uttar Pradesh

Team Careers360 24th Jan, 2024

Correct Answer: Haryana


Solution : The correct answer is Haryana

The states that held elections for state assemblies in 2022 are Goa, Punjab, Uttarakhand, Uttar Pradesh, Manipur, Himachal Pradesh, and Gujarat. The elections in Haryana will take place in 2024.

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Question : Wearing away of the landscape by different agents like water, wind and ice is called___________.

Option 1: weathering

Option 2: erosion

Option 3: metamorphosis

Option 4: sedimentation

Team Careers360 21st Jan, 2024

Correct Answer: erosion


Solution : The correct answer is erosion.

The whole process of landform formation is referred to as erosion. Erosion is the process by which the earth's surface is worn away by wind, water, and glacial ice. Disintegrated and loose elements are in motion. Erosion and weathering

25 Views

Question : Directions: Which of the following diagrams represents the relationship among the given classes Green, Mango, and Fruits?

Option 1:

Option 2:

Option 3:

Option 4:

Team Careers360 21st Jan, 2024

Correct Answer:


Solution : Based on the general information, all mangoes are fruits and some fruits and mangoes can be green. So, the circle of mango lies inside that of fruits. Also, some mangoes and fruits are green in colour. So, they will have some areas in common.
The Venn

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Question : What happens when a drop of glycerol is added to crushed potassium permanganate (KMnO).spread on a paper?

 

Option 1: There is a crackling sound 

Option 2: There is a violent explosion 

Option 3: There is no reaction 

Option 4: The paper ignites

Team Careers360 22nd Jan, 2024

Correct Answer: There is a violent explosion 


Solution : The correct option is - There is a violent explosion 

A strong combustion reaction happens when glycerol or glycerin is combined with solid potassium permanganate (KMnO₄). When in contact with glycerol, potassium permanganate, an extremely strong oxidant, instantly explodes. The rate

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