2.10. Which of these equations is always true? A. sin(x) = cos(x) B. sin(x) = cos(90° – x) C. sin(x) = cos(180° – x) D. sin(x) = cos(360° – x)

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.3: Trigonometric Functions Of Real Numbers
Problem 40E
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2.10. Which of these equations is always true?
A. sin(x) = cos(x)
B. sin(x) = cos(90° – x)
C. sin(x) = cos(180° – x)
D. sin(x) = cos(360° – x)
Transcribed Image Text:2.10. Which of these equations is always true? A. sin(x) = cos(x) B. sin(x) = cos(90° – x) C. sin(x) = cos(180° – x) D. sin(x) = cos(360° – x)
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