Solve the equation cos 2x = cos 144 for 0 x 360.
Question:
Solve the equation cos 2x = cos 144° for 0° ≤ x ≤ 360°.
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Step by Step Answer:
We can use the identity cos180x cosx to rewrite cos144 as follows cos144 cos180 36 cos36 Using the d...View the full answer
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Related Book For 
Complete Pure Mathematics 1 For Cambridge International AS & A Level
ISBN: 9780198427438
2nd Edition
Authors: Jean Linsky, Brian Western, James Nicholson
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