Unary trigonometric builtin functions implemented using the UnaryArithmetic abstraction.

...oracle/truffle/r/nodes/builtin/base/TrigExpFunctions.java

...rc/com/oracle/truffle/r/runtime/ops/BinaryArithmetic.java

.../com/oracle/truffle/r/test/builtins/TestBuiltin_acos.java

...com/oracle/truffle/r/test/builtins/TestBuiltin_acosh.java

.../com/oracle/truffle/r/test/builtins/TestBuiltin_asin.java

...com/oracle/truffle/r/test/builtins/TestBuiltin_asinh.java

.../com/oracle/truffle/r/test/builtins/TestBuiltin_atan.java

...com/oracle/truffle/r/test/builtins/TestBuiltin_atanh.java

...c/com/oracle/truffle/r/test/builtins/TestBuiltin_cos.java

.../com/oracle/truffle/r/test/builtins/TestBuiltin_cosh.java

...com/oracle/truffle/r/test/builtins/TestBuiltin_cospi.java

...com/oracle/truffle/r/test/builtins/TestBuiltin_expm1.java

...c/com/oracle/truffle/r/test/builtins/TestBuiltin_sin.java

.../com/oracle/truffle/r/test/builtins/TestBuiltin_sinh.java

...com/oracle/truffle/r/test/builtins/TestBuiltin_sinpi.java

...c/com/oracle/truffle/r/test/builtins/TestBuiltin_tan.java

.../com/oracle/truffle/r/test/builtins/TestBuiltin_tanh.java

...com/oracle/truffle/r/test/builtins/TestBuiltin_tanpi.java