proving trig identity#1 | Summary and Q&A

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July 30, 2016
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blackpenredpen
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proving trig identity#1

TL;DR

Learn how to verify a trig identity involving secant and tangent by using basic trigonometric identities and factoring.

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Questions & Answers

Q: What is the process of verifying a trig identity?

Verifying a trig identity involves starting from one side of the equation and performing manipulations to show that it is equal to the other side. It requires knowledge of basic trigonometric identities and the ability to factor out common terms.

Q: Why is it important to show all the steps when verifying a trig identity?

Showing all the steps is important because it demonstrates a thorough understanding of the process and allows the teacher to see how the equation was manipulated to reach the final result. It also helps to avoid any mistakes or errors.

Q: How can factoring be used to verify a trig identity?

Factoring involves identifying common terms or factors in an equation and grouping them together. In the case of verifying a trig identity, factoring can help simplify and manipulate the equation to make it easier to work with. By factoring out common terms, we can rearrange the equation to match the desired form.

Q: What are some important trigonometric identities to know for verifying trig identities?

One of the most important trigonometric identities is the Pythagorean identity, which states that sin^2(theta) + cos^2(theta) = 1. This identity can be used to derive other identities, such as the tangent and secant identities used in this video. Additionally, knowing the identities for sine, cosine, tangent, secant, and their reciprocals is crucial.

Summary & Key Takeaways

  • This video teaches how to verify a trig identity involving secant and tangent, starting from one side of the equation and showing that it is equal to the other side.

  • The video emphasizes the importance of knowing basic trig identities and the steps involved in verifying a trig identity.

  • The process involves factoring out common terms and manipulating equations using trigonometric identities.

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