state gov TNPSC Group 2/2A (தமிழ்நாடு) Mock Test 2024 Quantitative Aptitude Trigonometry

यदि \(\sin A=\frac{2}{5}\) है, जहाँ A एक न्यून कोण है, \(\frac{5 \sin A+2 \operatorname{cosec} A}{\sqrt{21} \sec A}\) मान क्या है?

1
\(\frac{5}{4}\)
2
\(\frac{7}{5}\)
3
\(\frac{4}{5}\)
4
\(\frac{5}{7}\)
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