Y=-9cos(.5x)

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Solution for Y=-9cos(.5x) equation: 


Simplifying
Y = -9cos(0.5x)

Remove parenthesis around (0.5x)
Y = -9cos * 0.5x

Reorder the terms for easier multiplication:
Y = -9 * 0.5cos * x

Multiply -9 * 0.5
Y = -4.5cos * x

Multiply cos * x
Y = -4.5cosx

Solving
Y = -4.5cosx

Solving for variable 'Y'.

Move all terms containing Y to the left, all other terms to the right.

Simplifying
Y = -4.5cosx

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