A ஒரு  குறுங்கோணம் என்றால், எளிமைப்படுத்தப்பட்ட வடிவம்

is :

This question was previously asked in
SSC CGL 2022 Tier-I Official Paper (Held On : 13 Dec 2022 Shift 4)
View all SSC CGL Papers >
  1. Cos2 A
  2. Sin A
  3. Sin2A
  4. Cos A

Answer (Detailed Solution Below)

Option 4 : Cos A
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PYST 1: SSC CGL - General Awareness (Held On : 20 April 2022 Shift 2)
25 Qs. 50 Marks 10 Mins

Detailed Solution

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பயன்படுத்தப்பட்ட கருத்து:

பயன்படுத்தப்படும் சூத்திரம்:

  • cos (π - θ) = - cos θ
  • cot (90 +  θ) = - tan θ 
  • cos (-θ) = cos θ  
  • tan (π + θ) = tan θ 
  • tan (3π/2 + θ) = - cot θ 
  • sin (2π - θ) = - sin θ

 

கணக்கீடு:

மேலே உள்ள சூத்திரத்தைப் பயன்படுத்தி

⇒ 

ஆனால்,  cos θ / sin θ =  cot θ  

⇒ - cot A. cos A/ cot A

⇒ cos A

∴ சரியான பதில்​ cos A.

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