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Assuming the angles are expressed in radians:

sin(5x) + sin(x) = 0

∴ sin(5x) = -sin(x)

∴ 5x = x + π

x = π/4

On the other hand, if your angles are in degrees, then the answer would be:

sin(5x) + sin(x) = 0

∴ sin(5x) = -sin(x)

∴ 5x = x + 180

∴ x = 180°/4

x = 45°

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โˆ™ 2009-07-26 22:55:07
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