5cos2 60 2+4sec 2 30°-tan 2 45°÷sin 2 30°+cos 2 30°
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5cos2 60 2+4sec 2 30°-tan 2 45°÷sin 2 30°+cos 2 30°
=5(1/2)^2 + 4(2/√3)^2-1
-----------------------------------(substitute the values)
(1/2)^2+(√3/2)^2
=5/4+16/3-1
-------------------(take the LCM)
1/4+3/4
=15+52-12
-----------------
12
= 55/12
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