Evaluate sec30° which of the following is it

a. √3/2
b. 2/√3
c.1/2
d. 2
help

4 answers

You should know the reciprocal identity: sec(theta) = 1/cos(theta)

Looking at a unit circle, cos(30°) is √3/2

So sec(30°)=1/cos(30°)=1/(√3/2)=2/√3

Hopefully, that made sense. Please ask more questions if you have any.

So your answer would be B

thanks!

NP!