tan(0.5x)=-x

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Solution for tan(0.5x)=-x equation: 


Simplifying
tan(0.5x) = -1x

Remove parenthesis around (0.5x)
ant * 0.5x = -1x

Reorder the terms for easier multiplication:
0.5ant * x = -1x

Multiply ant * x
0.5antx = -1x

Solving
0.5antx = -1x

Solving for variable 'a'.

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

Divide each side by '0.5ntx'.
a = -2n-1t-1

Simplifying
a = -2n-1t-1

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