Without using table, calculate the value of 1 + sec2 30o

A.
2(frac{1}{3}) 
B.
(frac{2}{15}) 
C.
(frac{5}{3}) 
D.
3(frac{1}{2})
Correct Answer: Option A
Explanation
1 + sec2 30o = sec 30o
= (frac{2}{sqrt{3}})
(frac{(2)^2}{3})
= (frac{4}{3})
1 + sec2 30o = sec 30o
= 1 + (frac{4}{3})
= 2(frac{1}{3})