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solve the equation -3tan^2 2x + 1=0?
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- BrainardLv 75 years ago
-3tan^2 2x + 1=0
tan^2(2x) = 1/3
tan(2x) = +/-sqrt(1/3)
For
tan(2x) = sqrt(1/3)
2x = tan^-1[sqrt(1/3)]
= 30, 210
x = 15, 105 deg
For tan(2x) = - sqrt(1/3)
2x = tan^-1[ - sqrt(1/3)]
= 150, 330
x = 75 165 deg
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