Y=-2cos(pi/2) - solution

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Solution for Y=-2cos(pi/2) equation:

Y in (-oo:+oo)

Y = -2*cos(pi/2) // + -2*cos(pi/2)

Y-(-2*cos(pi/2)) = 0

Y+2*cos(pi/2) = 0

Y = 0

Y = 0

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