cos²x = 3 sin² x 1 = 4 sin² x cos²x = 3 sin²x = sin²x 1-sin²x = 3 sin² x + = sin x is true at x values of 30°, 150°, 210°, 330°.
cos²x = 3 sin² x 1 = 4 sin² x cos²x = 3 sin²x = sin²x 1-sin²x = 3 sin² x + = sin x is true at x values of 30°, 150°, 210°, 330°.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
Related questions
Question
Arrange the steps in the correct order to solve this trigonometric equation.
Transcribed Image Text:So x = 30° +180°k or
x = 150° +180°k, where k is an
integer.
↓
↓
↓
↓
Transcribed Image Text:cos²x = 3 sin² x
+/=
1 = 4 sin² x
cos²x = 3 sin²x
= sin²x
1-sin²x = 3 sin² x
= sin x is true at x values of 30°,
150°, 210°, 330°.
√√= √sin² x
+ = sin x
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