Question
Download Solution PDFयदि sin A = \(\frac{3}{4}\) हो, तो cos A का मान ज्ञात कीजिए।
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Bihar STET Paper I: Mathematics (Held In 2019 - Shift 1)
Answer (Detailed Solution Below)
Option 2 : \(\frac{\sqrt{7}}{4}\)
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Bihar STET Paper 1 Mathematics Full Test 1
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Detailed Solution
Download Solution PDFगणना:
sin A = लंब/कर्ण = 3/4
पाइथागोरस प्रमेय से
(कर्ण)2 = (लंब)2 + (आधार)2
= 42 = 32 + आधार2
16 - 9 = आधार2
आधार = √7
CosA = आधार/कर्ण = √7/4
अतः, सही उत्तर विकल्प 2 है।
Last updated on Jan 29, 2025
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