Question

lim as x-->(- pi/2)^-. Find lim sec x

A) -infinity B) infinity C)0 D)1

Answer 1

Please rewrite your question.

Answer 2

im thrown off my the (-pi/2)^- the negative is confusing me

Answer 3

I see. That is not a negative exponent. That means the x approaches -pi/2 from LEFT.

Answer 4

ohhhh that makes since. so wehre do i go from there

Answer 5

To tackle this kind of question, we first convert sec(x) to 1/cos(x).

Answer 6

cos of pi/2 from the left gives -0.00000000000000000000000000000000000001

1/-0.00000000000000000000000000000000000001 = -infinity

Answer 7

Thank you.

Answer 8

Nooo problem :]

Answer 9

Ask me if you need more calculus help