\(\rm \left[\frac{\cos 50^\circ}{1+\sin 50^\circ}\right]+\left[\frac{1+\sin 50^\circ}{\cos50^\circ}\right]\) का मान कितना है?

This question was previously asked in
RRB Technician Grade III Official Paper (Held On: 28 Dec, 2024 Shift 1)
View all RRB Technician Papers >
  1. 2 cosec 50°
  2. 2 sec 50°
  3. 2 cot 50°
  4. 2 tan 50°

Answer (Detailed Solution Below)

Option 2 : 2 sec 50°
Free
General Science for All Railway Exams Mock Test
2.1 Lakh Users
20 Questions 20 Marks 15 Mins

Detailed Solution

Download Solution PDF

दिया गया है:

\(\rm \left[\frac{\cos 50^\circ}{1+\sin 50^\circ}\right]+\left[\frac{1+\sin 50^\circ}{\cos50^\circ}\right]\)

प्रयुक्त सूत्र:

cos² θ + sin² θ = 1

गणना:

\(\rm \left[\frac{\cos 50^\circ}{1+\sin 50^\circ}\right]+\left[\frac{1+\sin 50^\circ}{\cos50^\circ}\right]\)

दोनों पदों का लघुत्तम समापवर्तक लेने पर:

\(\frac{cos² 50° + (1 + sin 50°)² }{(1 + sin 50°) × cos 50°}\)

अंश का विस्तार:

cos² 50° + (1 + 2sin 50° + sin² 50°)

सर्वसमिका cos² θ + sin² θ = 1 का उपयोग करते हुए:

1 + (1 + 2sin 50°)

2 + 2sin 50°

अब, व्यंजक बन जाता है:

\(\frac{2 + 2sin 50°}{(1 + sin 50°) × cos 50°}\)

अंश से 2 को बाहर निकालिये:

\(\frac{2(1 + sin 50°)}{(1 + sin 50°) × cos 50°}\)

समान पद (1 + sin 50°) को काट दीजिये:

2 / cos 50°

1 / cos 50° का मान sec 50° है।

इसलिए, व्यंजक सरल होकर बन जाता है: 2 sec 50°

इसलिए, दिए गए व्यंजक का मान 2 sec 50° है।

Latest RRB Technician Updates

Last updated on Jun 30, 2025

-> The RRB Technician Notification 2025 have been released under the CEN Notification - 02/2025.

-> As per the Notice, around 6238 Vacancies is  announced for the Technician 2025 Recruitment. 

-> The Online Application form for RRB Technician will be open from 28th June 2025 to 28th July 2025. 

-> The Pay scale for Railway RRB Technician posts ranges from Rs. 19900 - 29200.

-> Prepare for the exam with RRB Technician Previous Year Papers.

-> Candidates can go through RRB Technician Syllabus and practice for RRB Technician Mock Test.

More Circular Measure of Angles Questions

Get Free Access Now
Hot Links: teen patti game paisa wala teen patti circle teen patti master official