Understanding Press-to-Test Restrictions

By default, all restrictions are selected when you enter Press-to-Test mode, with the exception of Numerical Solver.

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Selecting a restriction disables or limits its associated features during the Press-to-Test session.

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Clearing a restriction allows its associated features to be used during the session.

When you choose to limit geometry functions, all items on the Measurement, Construction, and Transformation menus are disabled.

Restricting Graphs Functions

On the Graphs menu, the following items are disabled:

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Actions > Coordinates and Equations

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Geometry > Measurement, Construction, and Transformation

Disabling Function and Conic Grab and Move

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You cannot move any function or conic in Graphs, Geometry, or Scratchpad. For example, if you have graphed y=x3, you can select the function but you cannot move or manipulate it by dragging.

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You cannot access the attribute that toggles the displayed form of a conic equation between Standard and Expanded.

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Disabling function and conic grab and move does not apply to lines and functions in Data & Statistics.

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Disabling function grab and move does not restrict sliders in the Graphs and Geometry applications.

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You can still grab the coordinate plane and move it around.

Disabling Vector Functions

When vector functions are disabled, students cannot calculate the following functions:

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Unit vector [unitV(]

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Cross product [crossP(]

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Dot product [dotP(]

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Eigenvector [eigVc(]

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Eigenvalue [eigVl(]

Disabling the “isPrime” Function

The isPrime( function determines if a number is a prime number (a whole number greater than two that is evenly divisible only by itself and one). Disabling this function prevents students from selecting the isPrime( command in the Catalog and from selecting Test > IsPrime in Math Operators. If a student manually enters the isPrime( function, submitting the expression results in an error message.

Disabling Differential Equation Functionality

The Differential Equation graph type is disabled in the Graphs and Geometry applications. Users cannot manually type and graph a differential equation.

Related math functions rk23(, euler(, and deSolve( are also disabled.

Disabling Inequality Graphing

When inequality graphing is disabled, students cannot graph inequalities with <, >, ≤, and ≥ or grab and drag inequalities to a graph in the Graphs, Geometry, and Scratchpad applications.

Disabling 3D Graphing

When this feature is disabled, students cannot use the 3D Graphing view.

Disabling Implicit Graphing, Conic Templates, Conic Analysis, and Geometric Conics

When these features are disabled, students cannot graph equations in terms of x = ay + c or ax + by = c. Conic templates are not available, and students cannot analyze conics or graph the geometric conic of an ellipse, parabola, hyperbola, or conic by five points.

Disabling Trigonometric Functions

Disabling trigonometric functions prevents students from using the following functions in calculations and graphing.

csc	sec	cot
csc-1, arccsc	sec-1, arcsec	cot-1, arccot
csch	sech	coth
csch-1, arccsch	sech-1, arcsech	coth-1, arccoth

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Attempting to evaluate any of these functions results in an error message.

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Students cannot select the csc, sec, cot, csc-1, sec-1, and cot-1 functions by pressing µ on the handheld.

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Students cannot select the disabled functions from the Catalog.

Disabling the logbx Template

Students cannot use the logbx (convert to logbase) and log(a, b) commands and templates, including logbx templates.

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When a students presses Ö on the handheld, only calculations in log10 format are accepted.

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If a student manually enters log(a,b) or >logbase( into an expression, attempting to evaluate the expression results in an error message.

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Students are allowed to enter log(a), log(a,10), and log(a,10.).

Disabling Summation Functions and Templates

Students are prevented from using summation functions and templates. The ∑( and sumSeq( functions are disabled.

Disabling Polynomial Root Finder

The polyRoots(, cPolyRoots(, solve(, simult(, zeros(, and cZeros( functions are disabled. Attempting to evaluate any of these functions results in an error message.

Note: When the polynomial tools are disabled, students cannot use Find Roots of Polynomial, Real Roots of Polynomial, or Complex Roots of Polynomial.

Disabling Simultaneous Equation Solver

The linSolve( and simult( functions are disabled in menus and in the Catalog. Attempting to evaluate either of these functions results in an error message.

Disabling Numerical Solver

The nSolve( is disabled in menus and in the Catalog. Attempting to evaluate either of these functions results in an error message.

Disabling Sliders

When this feature is disabled, students cannot insert or create sliders in the Graphs, Geometry, Data & Statistics, and Notes applications.

Disabled Chinese-English Dictionary

In Press-to-Test mode, the Chinese-English Dictionary is automatically disabled if installed on TI-Nspire™ CX-C handhelds. You cannot use the dictionary while in Press-to-Test mode.