# Juan Sebastian Lozano Muñoz

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 4 Limits that approach zero. 4 Trigonometry Identity: Prove that $\sin(a-b)=\sin a \cos b - \cos a \sin b$ 3 Is math built on assumptions? 3 The limit of an inverse trig function. 2 Trigonometry Question (finding the sin, cos, cosec etc on a right-angled triangle)

# 598 Reputation

 +10 Rotation of conics sections using linear algebra +10 Equivalence Class. +10 Limits that approach zero. +10 How to simplify this easy expression

# 5 Questions

 8 Suggestions for high school? 5 Definition of a logarithm 2 Rotation of conics sections using linear algebra 2 proof of $A - \left (B \cap C \right)= \left (A - B \right) \cup \left (A - C \right)$ 0 Proof that an odd perfect number must be in the form $36k+9$ or $12k+1$

# 32 Tags

 11 homework × 6 3 teaching × 2 11 calculus × 6 3 foundations 8 trigonometry × 3 3 nonclassical-logic 4 soft-question × 4 3 philosophy 4 proof-writing 2 reference-request × 3

# 10 Accounts

 Mathematics 598 rep 14 Programming Puzzles & Code Golf 390 rep 16 Academia 282 rep 27 Area 51 159 rep 1 Mathematics Educators 143 rep 3