Thread: Sketching trigonometric graphs and manipulating expressions

Hi there, I really need some help with the following:

1. a) Sketch the graph of f(x) = sec x for -3π ≤ x ≤ 3π
b) Write down an expression which explains the relationship between sec x and cos x

Originally Posted by norivea

Hi there, I really need some help with the following:

1. a) Sketch the graph of f(x) = sec x for -3π ≤ x ≤ 3π
b) Write down an expression which explains the relationship between sec x and cos x

b) secx = 1/cosx
secx and cosx are reciprocal of each other

a)