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solve the equation on the interval 0<theta <2pi. 2cos theta +3 =2

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Thank you,

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asked Oct 4, 2018 in TRIGONOMETRY by devkin26 Rookie

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1 Answer

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2cos theta +3 =2

Simplify the equation

2cos theta =2-3

2cos theta =-1

cos theta =-1/2

cos(2pi/3) = cos(4pi/3) = -1/2

Solution for theta is 2pi/3 and 4pi/3

answered Oct 5, 2018 by lilly Expert

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