Factor
\frac{-\left(\cos(a)\right)^{2}+3}{4}
Evaluate
\frac{-\left(\cos(a)\right)^{2}+3}{4}
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\frac{3\left(\sin(a)\right)^{2}+2\left(\cos(a)\right)^{2}}{4}
Factor out \frac{1}{4}.
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