Cos(a)=0.5

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Solution for Cos(a)=0.5 equation: 


Simplifying
Cos(a) = 0.5

Multiply osC * a
aosC = 0.5

Solving
aosC = 0.5

Solving for variable 'a'.

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

Divide each side by 'osC'.
a = 0.5o-1s-1C-1

Simplifying
a = 0.5o-1s-1C-1

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