Nilai dari cos 300 derajat

[tex]27 \cos(?) \beta \alpha \gamma e \cot( \frac{ { { \sqrt[ \sqrt{ {yyy}^{2} } ]{?} \times \frac{?}{?} \times \frac{?}{?} \times \frac{?}{?} \times \frac{?}{?} }^{?} }^{2} }{?} \times \frac{?}{?} ) [/tex]