1. Using these identities, prove the following: 1. Choose an angle between 61° and 89°. 2. Prove the half-angle identities work using your chosen angle and half of that angle. (For example if I choose 71°, then I'll be proving the identity for 71° and half of 71°, which is 35.5°.) Bi U Font Family -AA- A FE K sin(2a) = 2 sin(a) cos(a) cos(2a)= 1-2 sin² (a) + √ 囲 All changes saved You learned the double angle identities in the lesson content. The double-angle identities are used when we want to simplify a trig expression. Similarly, you can use the half-angle identities to simplify trig expressions. These identities are also useful in engineering and physics concepts.
1. Using these identities, prove the following: 1. Choose an angle between 61° and 89°. 2. Prove the half-angle identities work using your chosen angle and half of that angle. (For example if I choose 71°, then I'll be proving the identity for 71° and half of 71°, which is 35.5°.) Bi U Font Family -AA- A FE K sin(2a) = 2 sin(a) cos(a) cos(2a)= 1-2 sin² (a) + √ 囲 All changes saved You learned the double angle identities in the lesson content. The double-angle identities are used when we want to simplify a trig expression. Similarly, you can use the half-angle identities to simplify trig expressions. These identities are also useful in engineering and physics concepts.
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.1: Angles
Problem 3E
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