solve sin(theta)=-1 for all real values of (theta)

Question

I don't understand but by following the example in my book;

sec(theta)=-1
from the pattern of the secant function, sec(theta)=-1 if theta=pi*n, where n is an odd integer.

There is no example of sin.

Answer 1

Havent you ever seen a sine or cosine curve? Surely that is in your book. If not, toss the book quickly.

http://en.wikipedia.org/wiki/Sine_wave

Answer 2

thank you for the links and everything but I need someone outside the computer world to explain

Answer 3

my previous post still stands but is the answer 5pi/2?