Texas Instruments TI89TITANIUM User Manual - Page 787
as a complex number., Returns the angle
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AndPic CATALOG AndPic picVar[, row, column] Displays the Graph screen and logically "ANDS" the picture stored in picVar and the current graph screen at pixel coordinates (row, column). picVar must be a picture type. Default coordinates are (0,0), which is the upper left corner of the screen. In function graphing mode and Y= Editor: y1(x) = cos(x) C @ 2 ˆ Style = 3:Square „ Zoom = 7:ZoomTrig ƒ = 2:Save Copy As... Type = Picture, Variable = PIC1 y2(x) = sin(x) @ 2 ˆ Style = 3:Square y1 = no checkmark (F4 to deselect) „ Zoom = 7:ZoomTrig @ " AndPic PIC1 ¸ Done angle() MATH/Complex menu angle(expression1) ⇒ expression In Degree angle mode: Returns the angle of expression1, interpreting angle(0+2i) ¸ 90 expression1 as a complex number. In Gradian angle mode: Note: All undefined variables are treated as real variables. angle(0+3i) ¸ 100 In Radian angle mode: angle(1+i) ¸ p 4 angle(z) ¸ angle(x+ iy) ¸ angle(list1) ⇒ list angle(matrix1) ⇒ matrix Returns a list or matrix of angles of the elements in list1 or matrix1, interpreting each element as a complex number that represents a twodimensional rectangular coordinate point. In Radian angle mode: angle({1+2i,3+0i,0ì4i}) ¸ Appendix A: Functions and Instructions 787