The HIDDEN TRAP With Trig Identities👀

In this video, we'll uncover how to prove trigonometric identities like the one shown here, and we'll also show a trap to avoid. After verifying trig identities, we need to then restrict the domain in cases like these so that we aren't dividing by 0. We'll use the unit circle as discussed in precalculus to construct the domain restriction so that this trig identity proof is explicit about what values of x are and aren't allowed when satisfying the proof. Be sure to subscribe for more precalc and calculus AB Exam prep!

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0:00 - Introduction
0:20 - Rewriting the Equation
0:55 - Unit Circle Identity
1:18 - Solving the Equation
2:08 - Domain Trap
3:08 - Unit Circle Step
4:46 - Restrict The Domain

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