Question: In Exercises 1-4, explain why the equation is not an identity and find one value of the variable for which the equation is not true.

In Exercises 1-4, explain why the equation is not an identity and find one value of the variable for which the equation is not true.
1. sin Θ = √1 - cos2 Θ
2. tan Θ = √sec2 Θ -1
3. 1 - cos Θ = sin Θ
4. 1 + tan Θ = sec Θ

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