ΔABC, B पर एक समकोण त्रिभुज है। यदि tan A = \({{5} \over 12}\) है, तब sin A + sin B + sin C किसके बराबर होगा?

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SSC CGL 2022 Tier-I Official Paper (Held On : 03 Dec 2022 Shift 4)
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  1. \(1{{5} \over 13}\)
  2. \(2{{4} \over 13}\)
  3. \(3{{1} \over 13}\)
  4. \(2{{1} \over 13}\)

Answer (Detailed Solution Below)

Option 2 : \(2{{4} \over 13}\)
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Detailed Solution

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दिया गया है: 

tan A = \({{5} \over 12}\)

गणना:

F1 SSC Ishita 24.02.23 D4

जैसा कि हम जानते हैं कि tan = P/B और sin θ = P/H

इसलिए, H = √(P2 + B2)

⇒ H = √(52 + 122)

⇒ H = √(25 + 144)

⇒ H = √169

⇒ H = 13

अब,

sin A + sin B + sin C

= sin A + sin 90° + sin C

\({{5} \over 13}\) + 1 + \({{12} \over 13}\)

⇒ \({{5\,+\,13\,+12} \over 13}\)

⇒ \({{30} \over 13}\)

⇒ \(2{{4} \over 13}\)

∴ अभीष्ट उत्तर \(2{{4} \over 13}\) है।

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