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

Question

Quizplus · Accepted Answer

The expression $\sqrt { \sec ^ { 2 } x - \tan ^ { 2 } x } = 0$ simplifies to $\sqrt { 1 } = 0$ using the trigonometric identity $\sec^2x - \tan^2x = 1$, which is incorrect because $\sqrt{1} = 1$, not 0. Therefore, it is not an identity.

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 $\sqrt { \sec ^ { 2 } x - \tan ^ { 2 } x } = 0$