This Introduction to Apache Pig covers:
1. Pig philosophy and architecture
2. Pig Latin and the Grunt shell
3. Loading data
4. Data types and schemas
5. Pig Latin details: structure, functions, expressions, relational operators
6. User Defined Functions
7. Resources
41. ABS FLOOR
ACOS LOG
LOG10
ASIN
RANDOM
ATAN ROUND
CBRT SIN
CEIL SINH
COS SQRT
COSH TAN
TANH
EXP
http://pig.apache.org/docs/r0.11.0/func.html#math-functions