If cot \(A = {12 \over5}\), then the value of sin A = ?

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SSC CGL 2022 Tier-I Official Paper (Held On : 08 Dec 2022 Shift 2)
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  1. \(5 \over13\)
  2. \(12 \over13\)
  3. \(5 \over12\)
  4. \(13 \over12\)

Answer (Detailed Solution Below)

Option 1 : \(5 \over13\)
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Detailed Solution

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Given:

cot \(A = {12 \over5}\)

Formula used:

(Hypotenuse)2 = (Perpendicular)2 + (Height)2

Calculations:

⇒ cot \(A ={Base\over Perpendicular}= {12 \over5}\)

⇒ Length of the perpendicular = 5

⇒ Lenth of the base = 12

Using the above formula,

⇒ (Hypotenuse)2 = (Perpendicular)2 + (Height)2

⇒ (Hypotenuse)2 = 52 + 132 = 25 + 144 = 169

⇒ Hypotenuse = \(\sqrt{169}\) = 13

F8 Savita SSC 24-4-23 D3

⇒ Sin A = \(\frac{Perpendicular}{Hypotenuse }={5\over13}\)

⇒ Hence, Value of sin A is 5/13

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