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

Name: 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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Question

Quizplus · Accepted Answer

The expression is not an identity because $\sqrt{\sec^2x - \tan^2x}$ simplifies to $|\cos x|$, not $0$, due to the Pythagorean identity $\sec^2x - \tan^2x = 1$.

Decide Whether the Expression Is or Is Not an Identity sec⁡2x−tan⁡2x=0\sqrt { \sec ^ { 2 } x - \tan ^ { 2 } x } = 0sec2x−tan2x​=0

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