Let a be an angle measure and let the real numbers a, b, c, cos x...

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Let a be an angle measure and let the real numbers a, b, c, cos x be such that they make the following equation true: a cos x + bcos x + c = 0 Write the equivalent quadratic equation for a, b, c, cos 2x. Compare the given and the obtained equality for a = 4, 6 = 2, c = -1. Let a be an angle measure and let the real numbers a, b, c, cos x be such that they make the following equation true: a cos x + bcos x + c = 0 Write the equivalent quadratic equation for a, b, c, cos 2x. Compare the given and the obtained equality for a = 4, 6 = 2, c = -1.