how to solve: 2cos(3theta)=-2

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how to solve: 2cos(3theta)=-2

Guest Mar 13, 2015

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Best Answer

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2cos(3theta)=-2

divide both sides by 2

$$cos3\theta=-1$$

$$3\theta=\arccos$$(-1)

divide both sides by 3

$$\theta=60$$

Guest Mar 13, 2015

1⁺⁰ Answers

+5

Best Answer

2cos(3theta)=-2

divide both sides by 2

$$cos3\theta=-1$$

$$3\theta=\arccos$$(-1)

divide both sides by 3

$$\theta=60$$

Guest Mar 13, 2015

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