Freeflows

Status	Title	Difficulty
	2001. Lines' Acute Angle Cosine	Level 4
	2002. Matrix Trace and Determinant	Level 4
	2003. Trigonometric Sum Solution	Level 5
	2004. Angle Computation in Triangle	Level 3
	2005. Intersection Angle of Lines	Level 5
	2006. Complex Sequence Solution Count	Level 4
	2007. Cosine Squares Sum Simplification	Level 3
	2008. Minimum Vector Magnitude	Level 5
	2009. Triangle Side Length Difference 1	Level 5
	2010. Volume of Point Set Region	Level 4
	2011. Sine of Arcsine Sum	Level 2
	2012. Determinant Zero Condition	Level 4
	2013. Trigonometric Equation Solutions 7	Level 2
	2014. Tan Equation Minimum Solution	Level 3
	2015. Minimum Vector Norm	Level 3
	2016. Plane From Vector Projection	Level 3
	2017. Line Perpendicularity and Point	Level 5
	2018. Vectors' Maximum Angle	Level 4
	2019. Matrix Determinant Transformation	Level 2
	2020. Unique Positive Real Pair	Level 4