In Example 4, change cos 1/2x to sin 1/2x and on the right of the equal sign
Question:
In Example 4, change cos 1/2x to sin 1/2x and on the right of the equal sign change the + to −.
Data from Example 4
Solve the equation cos(x/2) = 1 + cos x (0 ≤ x < 2π).
By using the half-angle formula for cos (x/2) and then squaring both sides of the resulting equation, this equation can be solved:
Transcribed Image Text:
|1 + cosx 2 1+ cosx 2 2 cos²x+3 cos x + 1 = 0. H = 1 + cos.x 1 + 2 cosx + cos²x (2cosx +1)(cosx + 1) = 0 cosx =--- = 2π 4π -4, 3 3 X = ㅠ
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Related Book For
Basic Technical Mathematics
ISBN: 9780137529896
12th Edition
Authors: Allyn J. Washington, Richard Evans
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