खाली दिलेल्या आकृतीमध्ये, AB ∶ BC = 4: 5 असल्यास, AD: AB गुणोत्तर शोधा.

  1. 2:1
  2. 3:2
  3. 4:3
  4. 5:4

Answer (Detailed Solution Below)

Option 2 : 3:2
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Detailed Solution

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दिलेली माहिती, AB ∶ BC = 4 ∶ 5

⇒ BC  = (5/4) × AB 

∵ AC = AB + BC  

⇒ AC = AB + (5/4) × AB = (9/4) × AB

टॅन्जेन्ट-कोसाइन प्रमेय लागू केल्यास, टॅन्जंट आणि कोसाइन खालील प्रमाणे संबंधित आहेत,

⇒ AD2 = AB × AC

⇒ AD2 = (9/4) × AB2

⇒ AD/AB = √(9/4) = 3/2

∴ AD ∶ AB = 3 ∶ 2

 

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