SSC CHSL 2023 PYQ — Question 58

SSC CHSL - 07 Aug 2023 - Shift 3 • Quantitative Aptitude • Q58

In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank. When Mr. Smith went to a restaurant one day, he left his coat near the door. There was (1)________ in the pockets when he left it, so he was very surprised when he took his coat after his meal and found the (2)________ full of jewellery. There was a waiter near the door, so Mr. Smith said to him, “Somebody has made a mistake. He has put some (3)________ in my coat. Take it, and when he comes back, give it to him.” The waiter took it and went away. Suddenly another man came in with a (4)________ just like Mr. Smith’s. “I am sorry,” said the man , “I made a mistake. I took your coat and you have got mine. Please give me my coat and jewellery.” Mr. Smith answered.” I gave the jewellery to the waiter. He will give it to you.” Mr. Smith called the manager of the restaurant; but the manager said, “We have (5)________ waiters here. We have only waitresses.” “You gave the jewellery to a thief!” shouted the other man. “I shall send for the police!” Mr. Smith paid the man a lot of money for the jewellery.

The given expression is equal to:

2secAsec2A−1\frac{2 secA}{sec^2A-1}

Show answer & explanation

Correct answer: A

Explanation

The correct answer is option 1 i.e. 2cosecAcotA.

sec2A - 1 = tan2A

Also, secA = 1/cosA; cosecA = 1/sinA; tanA = sinA/cosA; cotA = cosA/sinA

According to the given question,

2secAsec2A−1\frac{2 secA}{sec^2A-1} = 2secAtan2A\frac{2 secA}{tan^2A}

⇒ 2cos2Asin2A.cosA\frac{2 cos^2A}{sin^2A.cosA} = 2cosecAcotA