正切

zhèngqiē
(math.) tangent (trigonometric function)

CEDICT

math

Entry Composition

1 正 zhèng
  1. straight
  2. upright
  3. proper
  4. main
  5. principal
  6. to correct
  7. to rectify
  8. exactly
  9. just (at that time)
  10. right (in that place)
  11. (math.) positive
2 切 qiē
  1. to cut; to slice; to carve
  2. (math) tangential