railway RRB Technician Grade 1 Mock Test 2024 Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

cos 20º cos 35º cos 45º cosec 55º cosec 70º का मान ज्ञात कीजिए।

1
1
2
\(\sqrt{2}\)
3
\(\frac{1}{\sqrt{2}} \)
4
1/2
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