Question

sec (-theta)=secant theta (or) -secant theta ??​

Answer 1

Step-by-step explanation:

sec(-A) = 1/cos(-A)

As you know, cosine of -ve is not differ from that of +ve.

Implies, sec(-A) = 1/cos(-A) = 1/cosA = secA

Answer 2

Answer:

I don't understand.......