Decide Whether the Expression Is or Is Not an Identity $$\sqrt { \sec ^ { 2 } x - \tan ^ { 2 } x } = 0$$

question 380

Multiple Choice

Decide whether the expression is or is not an identity.
- $$\sqrt { \sec ^ { 2 } x - \tan ^ { 2 } x } = 0$$

• A) Identity
• B) Not an identity

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