Prove the following identity. (sin x – cos x)2 = 1 - sin 2x We begin by expanding the left side of the equation, and then regroup. We can then use a to simplify. (sin x – cos x)2 = sin? x – 2 sin x cos x + sin? x + - 2 sin x cos x - 2 sin x cos x = 1 - sin 2x II

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.3: The Addition And Subtraction Formulas
Problem 60E
icon
Related questions
Question

need help 

Prove the following identity.
(sin x
cos x)2 = 1 - sin 2x
We begin by expanding the left side of the equation, and then regroup. We can then use a Pythagorean Identity and a Double-Angle Formula
to simplify.
(sin x
cos x)2
sin? x
2 sin x cos x +
= (sin? x +
2 sin x cos X
- 2 sin x cos X
= 1
sin 2x
|
Transcribed Image Text:Prove the following identity. (sin x cos x)2 = 1 - sin 2x We begin by expanding the left side of the equation, and then regroup. We can then use a Pythagorean Identity and a Double-Angle Formula to simplify. (sin x cos x)2 sin? x 2 sin x cos x + = (sin? x + 2 sin x cos X - 2 sin x cos X = 1 sin 2x |
Expert Solution
steps

Step by step

Solved in 2 steps

Blurred answer
Knowledge Booster
Point Estimation, Limit Theorems, Approximations, and Bounds
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, trigonometry and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
Algebra
ISBN:
9781133382119
Author:
Swokowski
Publisher:
Cengage
Trigonometry (MindTap Course List)
Trigonometry (MindTap Course List)
Trigonometry
ISBN:
9781305652224
Author:
Charles P. McKeague, Mark D. Turner
Publisher:
Cengage Learning
Trigonometry (MindTap Course List)
Trigonometry (MindTap Course List)
Trigonometry
ISBN:
9781337278461
Author:
Ron Larson
Publisher:
Cengage Learning