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| Math Central | Quandaries & Queries |
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Question from Steve, a student: 2cos^2(X)-2sin^2(x)+1=0 |
Hi Steve,
2cos2(x) - 2sin2(x) + 1 = 0
can be written
2[cos2(x) - sin2(x)] = -1
Use an expression for cos(2x) and solve for x.
Harley
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