Reference Guide

Full Command and Function Reference 3-251
TCOLLECT
Type: Command
Description: Linearizes products in a trigonometric expression by collecting sine and cosine terms, and by
combining sine and cosine terms of the same argument.
Access: Trigonometry, …ÑL
Input: An expression with trigonometric terms.
Output: The simplified expression.
Flags: Exact mode must be set (flag –105 clear).
Numeric mode must not be set (flag –3 clear).
Radians mode must be set (flag –17 set).
Example: Collect terms in the expression:
2
sin
x
2
cos
x
+
Command: TCOLLECT(SIN(2*X)+COS(2*X))
Result: √ 2*COS(2*X- π /4)
See also: TEXPAND, TLIN
TDELTA
Type: Function
Description: Temperature Delta Function: Calculates a temperature change.
TDELTA subtracts two points on a temperature scale, yielding a temperature increment (not an
actual temperature). x or x_unit1 is the final temperature, and y or y_unit2 is the initial
temperature. If unit objects are given, the increment is returned as a unit object with the same
units as x_unit1. If real numbers are given, the increment is returned as a real number.
Access: …µ TDELTA
Flags: Numerical Results (–3)
Input/Output:
Level 2/Argument 1 Level 1/Argument 2 Level 1/Item 1
x y
→
x
delta
x_unit1 x_unit2
→
x_unit1
delta
x_unit 'symb'
→
'TDELTA(x_unit, symb)'
'symb' y_unit
→
'TDELTA(symb, y_unit)'
'symb
1
' 'symb
2
'
→
'TDELTA(symb
1
, symb
2
)'
See also: TINC
TESTS
Type: Command
Description: Displays a menu or list containing the ASSUME and UNASSUME commands, and tests that can
be included in algebraic expressions.
Access: Catalog, …µ
Flags: If the CHOOSE boxes flag is clear (flag –117 clear), displays the operations as a numbered list. If
the flag is set, displays the operations as a menu of function keys.
See also: ALGB, ARIT, CONSTANTS, DIFF, EXP&LN, INTEGER, MAIN, MATHS, MATR,
MODULAR, POLYNOMIAL, REWRITE, TRIGO