2cos²t+3cost-2=0

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2cos²t+3cost-2=0

Guest Feb 17, 2015

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Best Answer

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This can be written as: (cos(t) + 2)(2cos(t) - 1) = 0

1. cos(t) = -2 is not possible, so we must have

2. cos(t) = 1/2, which means that t = ±60°

.

Alan Feb 17, 2015

1⁺⁰ Answers

+33661

+5

Best Answer

This can be written as: (cos(t) + 2)(2cos(t) - 1) = 0

1. cos(t) = -2 is not possible, so we must have

2. cos(t) = 1/2, which means that t = ±60°

.

Alan Feb 17, 2015

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