| Operation | TI-84 Plus CE | TI-Nspire CX II | Casio fx-CG50 |
|---|---|---|---|
| Set degree mode (AI SL default) | [MODE] → DEGREE | [doc] → Settings → Document Settings → Angle: Degree | [SHIFT][MENU] (SET UP) → Angle: Deg |
| Set radian mode (for complex args) | [MODE] → RADIAN | [doc] → Settings → Document Settings → Angle: Radian | [SHIFT][MENU] (SET UP) → Angle: Rad |
| Complex \( a + bi \) mode | [MODE] → a+b\( i \) (or re^(\( \theta i \))) | On by default; insert \( i \) from keypad / symbol palette | [SHIFT][MENU] → Complex Mode → a+bi (or r∠\( \theta \)) |
| Scientific (standard-form) display | [MODE] → SCI | [doc] → Settings → Exponential Format = Scientific | [SHIFT][MENU] (SET UP) → Display = Sci |
| Enter standard form (e.g. \( 3.45\times10^4 \)) | [2nd][,] (EE) → type 3.45E4 | [EE] key, or type 3.45×10^4 | [EXP] / [×10x] → 3.45 EXP 4 |
| Turn on \( r \) / \( r^2 \) in regression (DiagnosticOn) | [2nd][CATALOG] → DiagnosticOn | Always reported — no setting needed | Always reported — no setting needed |
angle/Arg will return degrees.| Operation | TI-84 Plus CE | TI-Nspire CX II | Casio fx-CG50 |
|---|---|---|---|
| Sum a sequence \( \sum_{k=1}^{20}(3k+5) \) | [2nd][STAT] (LIST) → MATH sum( + OPS seq( → sum(seq(3X+5, X, 1, 20)) | Templates key → Σ template: k=1, 20, body 3k+5 (or sum(seq(3k+5, k, 1, 20))) | Run-Matrix: OPTN → LIST → Seq to build list, then OPTN → LIST → Sum |
| Change of base \( \log_2 8 \) | [MATH] → logBASE( → logBASE(8, 2) | log template [log□] or type log(8, 2) | Run-Matrix → [MATH] menu → \( \log_{\square}(\square) \) template (not [SHIFT][log]) |
| Compound interest / future value (TVM) | [APPS] → Finance → TVM Solver → cursor on FV, [ALPHA][ENTER] | [Menu] → Finance → Finance Solver → leave FV blank, tab to it, [Enter] | [MENU] → Financial → Compound Interest → highlight FV, [SOLVE] (F5/F6) |
| Solve for interest rate \( I\% \) | TVM Solver → cursor on I%, [ALPHA][ENTER] | Finance Solver → leave I(%) blank, tab to it, [Enter] | Compound Interest → F-key under I% (F2) |
| Loan / annuity payment (PMT) | TVM Solver → cursor on PMT, [ALPHA][ENTER] | Finance Solver → leave PMT blank, tab to it, [Enter] | Compound Interest → F-key under PMT (F4) |
| Depreciation (use negative rate) | TVM Solver → enter negative I%, solve FV | Finance Solver → enter negative I(%), solve FV | Compound Interest → negative I%, P/Y=C/Y=1, solve FV |
| Operation | TI-84 Plus CE | TI-Nspire CX II | Casio fx-CG50 |
|---|---|---|---|
| Graph a function | Enter in [Y=] → [GRAPH] | Open Graphs → type equation → [Enter] | [MENU] → Graph → enter Y1 → [DRAW] (F6) |
| Find zeros / roots (solve \( f(x)=0 \)) | [2nd][CALC] → 2: zero → set bounds per root | [Menu] → Analyze Graph → Zero → set bounds | [G-SOLV] (SHIFT+F5) → ROOT |
| Intersection (solve \( f(x)=g(x) \)) | both in [Y=] → [2nd][CALC] → 5: intersect | [Menu] → Analyze Graph → Intersection | [G-SOLV] (SHIFT+F5) → INTSECT (ISCT) |
| Maximum / minimum (vertex, turning point) | [2nd][CALC] → 3: minimum / 4: maximum → bounds | [Menu] → Analyze Graph → Minimum / Maximum | [G-SOLV] (SHIFT+F5) → MIN / MAX |
| Equation solver (algebraic, e.g. cosine rule) | [MATH] → Solver → enter as \( =0 \), cursor on X, [ALPHA][ENTER] | nSolve(eqn, x) or solve(eqn, x) in Calculator | Menu → Equation → F3 (SOLVER) → type eqn → F6 (SOLV) |
| Evaluate inverse \( f^{-1}(k) \) | graph \( y=f(x) \) & \( y=k \) → intersect → read \( x \) | graph both → Analyze Graph → Intersection → read \( x \) | graph Y1=\( f(x) \), Y2=\( k \) → G-SOLV INTSECT → read \( x \) |
| Operation | TI-84 Plus CE | TI-Nspire CX II | Casio fx-CG50 |
|---|---|---|---|
| Enter \( x,y \) data | [STAT] → Edit (x in L1, y in L2) | Lists & Spreadsheet (x in col A, y in col B) | [MENU] → Statistics (x in List 1, y in List 2) |
| Linear regression \( y=ax+b \) (reports \( r, r^2 \)) | [STAT] → CALC → 4: LinReg(ax+b) L1, L2 | [Menu] → Statistics → Stat Calculations → Linear Regression (mx+b) | [CALC] (F2) → REG (F3) → X (linear) |
| Quadratic regression (reports \( R^2 \) only) | [STAT] → CALC → 5: QuadReg | Stat Calculations → Quadratic Regression | REG (F3) → \( X^2 \) |
| Cubic regression (reports \( R^2 \) only) | [STAT] → CALC → 6: CubicReg | Stat Calculations → Cubic Regression | REG (F3) → \( X^3 \) |
| Exponential regression \( y=ab^{x} \) (reports \( r, r^2 \)) | [STAT] → CALC → 0: ExpReg | Stat Calculations → Exponential Regression | REG (F3) → EXP |
| Sinusoidal regression (no \( r \) / \( R^2 \)) | [STAT] → CALC → SinReg | Stat Calculations → Sinusoidal Regression | REG (F3) → Sin |
| Operation | TI-84 Plus CE | TI-Nspire CX II | Casio fx-CG50 |
|---|---|---|---|
| 1-Var Stats (mean, \( \sigma_x \), quartiles) | [STAT] → CALC → 1: 1-Var Stats L1 (,L2 freq) | Stat Calculations → One-Variable Statistics | [CALC] (F2) → 1-VAR (set Freq in SET F6) |
| Box plot | [2nd][Y=] (STAT PLOT) → choose box-plot icon → [GRAPH] | Data & Statistics page → set plot type to Box Plot | [GRAPH] (F1) → SET (F6) Graph Type: MedBox → DRAW |
| Normal cdf \( P(a<X<b) \) | [2nd][DISTR] → normalcdf(lower, upper, \( \mu, \sigma \)) | Distributions → Normal Cdf(lower, upper, \( \mu, \sigma \)) | DIST (F5) → NORM → Ncd (enter lower, upper, \( \sigma, \mu \)) |
| Inverse normal (find \( x \) from a left-tail area) | DISTR → invNorm(area, \( \mu, \sigma \)) | Distributions → Inverse Normal(area, \( \mu, \sigma \)) | DIST → NORM → InvN (Tail: Left; area, \( \sigma, \mu \)) |
| Binomial pdf \( P(X=k) \) | DISTR → binompdf(n, p, k) | Distributions → Binomial Pdf(n, p, k) | DIST (F5) → BINM → Bpd (x=k, Numtrial=n, p) |
| Binomial cdf \( P(X\leq k) \) | DISTR → binomcdf(n, p, k) | Distributions → Binomial Cdf(n, p, lower, upper) | BINM → Bcd (x=k, Numtrial=n, p) |
| Poisson pdf / cdf HL | DISTR → poissonpdf(\( \lambda, x \)) / poissoncdf(\( \lambda, x \)) | Distributions → Poisson Pdf / Poisson Cdf(lower, upper, \( \lambda \)) | DIST → POISN → Ppd / Pcd |
| \( \chi^2 \) test for independence (2-way) | enter matrix [A] → [STAT] → TESTS → \( \chi^2 \)-Test | store obs matrix → Stat Tests → \( \chi^2 \) 2-way Test | TEST → CHI → 2WAY (F6 shows expected) |
| \( t \)-test for two means (Pooled: No) | [STAT] → TESTS → 2-SampTTest | Stat Tests → 2-Sample \( t \) Test | TEST → t → 2-Sample |
| \( z \)-interval for the mean (known \( \sigma \)) HL | [STAT] → TESTS → ZInterval | Confidence Intervals → z Interval | INTR → Z → 1-Sample |
| Operation | TI-84 Plus CE | TI-Nspire CX II | Casio fx-CG50 |
|---|---|---|---|
| Numeric derivative \( f'(a) \) | [MATH] → 8: nDeriv( → nDeriv(\( Y_1 \), X, a) | Calculus → Numerical Derivative, or Graphs → Analyze → dy/dx | graph → [G-SOLV] (SHIFT+F5) → dy/dx; or [OPTN] CALC \( \frac{d}{dx} \) |
| Numeric definite integral \( \int_a^b f(x)\,dx \) | [MATH] → 9: fnInt( → fnInt(\( f \), X, a, b); or [2nd][CALC] → 7: \( \int f \)dx | nInt(\( f \), x, a, b); or Graphs → Analyze Graph → Integral | [G-SOLV] (SHIFT+F5) → \( \int \)dx; or [OPTN] CALC integral template |
| Operation | TI-84 Plus CE | TI-Nspire CX II | Casio fx-CG50 |
|---|---|---|---|
| Enter a matrix | [2nd][x⁻¹] (MATRIX) → EDIT → [A] | Define a := [[2,3][1,4]] (matrix template) | [MENU] → Run-Matrix → [F3] (MAT) → Mat A |
| Multiply matrices | \( [A] \times [B] \) | \( a \cdot b \) | \( \text{Mat A} \times \text{Mat B} \) |
| Determinant | MATRIX → MATH → det([A]) | det(a) | [OPTN] → MAT/VCT → Det → det(Mat A) |
| Inverse | \( [A] \)[x⁻¹] | \( a^{-1} \) | Mat A[x⁻¹] |
| Power \( A^n \) (adjacency / Markov) | \( [A]\hat{}n \) | \( a\hat{}n \) | \( \text{Mat A}\hat{}n \) |
| Solve a linear system \( A\mathbf{x}=\mathbf{b} \) | enter [A], [B] → compute \( [A]^{-1}[B] \) | simultEqn() or rref() on augmented matrix | Menu → Equation → Simultaneous; or \( \text{Mat A}^{-1}\times\text{Mat B} \) |
| Eigenvalues | — (no native command; use PlySmlt2 on \( \lambda^2-(a+d)\lambda+\det A=0 \), or by hand) | eigVl(a) (Matrix & Vector → Advanced → Eigenvalues) | — (no command; solve \( \det(A-\lambda I)=0 \) by hand) |
| Eigenvectors | — (by hand from each eigenvalue) | eigVc(a) | — (by hand from each eigenvalue) |
| Operation | TI-84 Plus CE | TI-Nspire CX II | Casio fx-CG50 |
|---|---|---|---|
| Enter \( i \) | [2nd][.] | \( i \) key / symbol palette | [SHIFT][0] |
| Modulus \( |z| \) | abs(z) |
abs(z) |
[OPTN] → COMPLEX → Abs |
| Argument \( \arg(z) \) (radian mode!) | angle(z) |
angle(z) |
[OPTN] → COMPLEX → Arg |
| Conjugate \( \bar{z} \) | — (use \( a-bi \), or conj via CATALOG) | conj(z) |
[OPTN] → COMPLEX → Conj |
| Polar ↔ rectangular form | set [MODE] a+b\( i \) or re^(\( \theta i \)) to choose display | ▸Polar / ▸Rect, or type \( r\,e^{(i\theta)} \) | [SHIFT][MENU] → Complex Mode → a+bi or r∠\( \theta \) |
| Powers, e.g. \( (1+i)^8 \) | (1+i)^8 [ENTER] |
(1+i)^8 [Enter] |
(1+i)^8 [EXE] |
angle / Arg returns the argument in degrees. The TI-84 has no one-key conjugate — type \( a-bi \) directly, or find conj( in the CATALOG.