state gov RSMSSB Junior Assistant & Lipik Grade (LDC) Mock Test 2024 Quantitative Aptitude Trigonometry Circular Measure of Angles
What is the value of \({5\over2}\ {\{{cos37^o\over sin53^o}}\}-{1\over2}(sin^2 \ 39^o + sin^2 \ 51^o)\)?
1
sin2 51° − sin 53°
2
sin 53° + tan 51°
3
2
4
1