Question
Download Solution PDF cosec 20° - sec 20° का मान किसके बराबर है?
cosec 20° - sec 20° का मान किसके बराबर है?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFसंकल्पना:
त्रिकोणमितीय सर्वसमिका:
- (cos A× cos B) – (sin A × sin B) = cos(A + B)
- 2 × sin A × cos A = sin (2A)
- sin (90 - θ) = cos θ
गणना:
दिया गया है कि: √3 cosec 20° – sec 20°
चूँकि हम जानते हैं कि, cosec θ = 1/ sin θ और sec θ = 1/ cos θ
चूँकि हम जानते हैं कि, cos 30° = √3 / 2, sin 30° = ½
चूँकि हम जानते हैं कि, (cos A × cos B) – (sin A × sin B) = cos(A + B)
चूँकि हम जानते हैं कि, 2 × sin A × cos A = sin (2A)
चूँकि हम जानते हैं कि, sin (90 - θ) = cos θ
⇒ 4
Last updated on May 30, 2025
->UPSC has released UPSC NDA 2 Notification on 28th May 2025 announcing the NDA 2 vacancies.
-> A total of 406 vacancies have been announced for NDA 2 Exam 2025.
->The NDA exam date 2025 has been announced for cycle 2. The written examination will be held on 14th September 2025.
-> Earlier, the UPSC NDA 1 Exam Result has been released on the official website.
-> The selection process for the NDA exam includes a Written Exam and SSB Interview.
-> Candidates who get successful selection under UPSC NDA will get a salary range between Rs. 15,600 to Rs. 39,100.
-> Candidates must go through the NDA previous year question paper. Attempting the NDA mock test is also essential.