ఒకవేళ sin θ = అయితే, (3cos θ - 4 cos3 θ)  విలువ కనుగొనండి?

This question was previously asked in
SSC CGL 2022 Tier-I Official Paper (Held On : 06 Dec 2022 Shift 3)
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  1. 0
  2. 1
  3. 2
  4. -1

Answer (Detailed Solution Below)

Option 1 : 0
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SSC CGL Tier 1 2025 Full Test - 01
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Detailed Solution

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ఇచ్చిన సమస్య:

sin θ = 

ఉపయోగించిన భావన:

సాధన:

sin θ = 

⇒ sinθ = sin 30°

అయితే, θ = 30°

3cos θ - 4 cos3 θ

⇒ 3 ×  - 4 × 

⇒ 

⇒ 0

∴ అవసరమైన సమాధానం 0.

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