2cos^2(-3/5)-1

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Solution for 2cos^2(-3/5)-1 equation: 


6*((1/4)*x-2) = 18

v/6-11 = -10

1-((6/7)*x) = 4/7

(1/3)*x-2 = x+2

0.01*x-1 = 0.1*x-0.1

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