cos 45 : sec 30 + cosec 30 = .....

cos 45 = √2 /2
sec 30 = 1/ cos 30 = 2/√3
cosec 30= 1/sin 30 = 2

Maka cos 45 : sec 30 + cosec 30
=√2/2 x √3/2 + 2
= √6/4 +2
=(√6 + 8)/4