# 4. Equation or Identity? Is the following relationship an equation or an identity? If an equation, solve it. If an identity, prove it. #(secx-tanx)^2 = (1-sinx)/(1+sinx)#

##### 1 Answer

Mar 6, 2018

Identity

#### Explanation:

Usually i start by plugging in some nice values,

if it is true for these values try proving it as an identity,

in this example it is true for

So we try proving it as an identity

The two sides are equal, hence an identity