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Pearson Algebra 2 Common Core, 2011

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Pearson Algebra 2 Common Core, 2011 View details

2. Solving Trigonometric Equations Using Inverses

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Exercise 75 Page 918

Recall the Trigonometric Identities. Start by using the Pythagorean Identity $sin^{2} θ + cos^{2} θ = 1 .$

$1$

Practice makes perfect

At first, let's recall one of the Pythagorean Identities. We will need to rearrange the terms so that we can use it for our expression.

sin^{2} θ + cos^{2} θ = 1 ⇕ sin^{2} θ = 1 - cos^{2} θ

With this identity, we can substitute

sin^{2} θ

for

1 - cos^{2} θ

in our expression.

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Subchapter links

Lesson Check p.915

Practice and Problem-Solving Exercises p.916-918

Standardized Test Prep p.918

Mixed Review p.918