PHP math functions

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Which one from followings is not a trigonometric function

Which one from followings is not a trigonometric function
  • A. sin( )
  • B. atan ( )
  • C. Tan ( )
  • D. pow ( )
  • Correct Answer: Option D

Which one from following is an example of arbitrary precision function

Which one from following is an example of arbitrary precision function
  • A. bcadd ( )
  • B. atan ( )
  • C. Tan ( )
  • D. decoct ( )
  • Correct Answer: Option A