Hello Everyone,

I have the following instruction, "Use trigonometric identities to transform one side of the equation into the other" ?

First I don't exactly understand what the instructions are saying.

The problem is as follows

cos Θ sec Θ = 1

The book gives me the solution which is

cos Θ sec Θ = 1 $\displaystyle \frac{1}{sec Θ}$ = 1

( 0 < Θ < π/2) (I guess this means Θ is an acute angle)