Question
Download Solution PDF का मान ज्ञात कीजिए।
का मान ज्ञात कीजिए।
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFसंकल्पना:
- cos 2A = cos2 A – sin2 A = 1 – 2 sin2 A = 2 cos2 A – 1
गणना:
चूँकि हम जानते हैं कि, cot x = cos x / sin x
चूँकि हम जानते हैं कि,
चूँकि हम जानते हैं कि, 0° < A / 2 < 90° जहाँ सभी त्रिकोणमितीय अनुपात धनात्मक हैं।
चूँकि हम जानते हैं कि,
चूँकि हम जानते हैं कि, 0° < A / 2 < 90° जहाँ सभी त्रिकोणमितीय अनुपात धनात्मक हैं।
अतः समीकरण (1) और (2) से, हमें निम्न प्राप्त होता है
Last updated on Jun 18, 2025
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