यदि फलन sgn(ln(sinx)) = 0 है, तो x का मान ज्ञात कीजिए। 

  1. x = π 
  2. x = 0

Answer (Detailed Solution Below)

Option 1 :
Free
NDA 01/2025: English Subject Test
30 Qs. 120 Marks 30 Mins

Detailed Solution

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संकल्पना:

  द्वारा परिभाषित वास्तविक फलन f: R → R को चिह्न फलन कहा जाता है। 

f का डोमेन = f की सीमा = {1, 0, – 1} 

चिन्ह फलन के आलेख को नीचे देखा जा सकता है -

गणना:

दिया गया फलन sgn(ln(sinx)) = 0 है। 

चूँकि हम जानते हैं कि चिन्ह फलन 0 केवल तब होता है जब x = 0 है। 

∴ ln (sinx) = 0

∴ sin (x) = 1

⇒ 

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