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Solve 5cos(2x)=5cos2(x)−15cos(2x)=5cos2(x)-1 for all solutions 0≤ x <2π

Solve

5cos(2x)=5cos2(x)−15cos(2x)=5cos2(x)-1

for all solutions 0≤ x <2π

Math   Precalculus   
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