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23-10-2020
Mathematics

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cos (3 X +6 ) =sin 30

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GGGGGG104 GGGGGG104

23-10-2020

cos (3X+6) = 1/2
cos^-1(1/2)=60
3x+6=60
3x=60-6
3x=54
x=54/3
X=18

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