Trigonometric Identities Reference (TI-84 Plus CE)
Trigonometric Identities Reference (TI-84 Plus CE)
⚠️ Before You Buy:
• Digital product — No refunds
• Requires TI-84 Plus CE or TI-84 Plus CE Python
• NOT compatible with older TI-84 Plus (black & white screen)
• By purchasing, you confirm you understand this is a digital download and cannot be returned
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Trigonometric Identities Reference (TI-84 Plus CE)
📐 40+ Trig Identities — Organized for Fast Calculator Lookup
Keep 40+ trig identities inside your calculator. TRIGID2 is a reference program for TI-84 Plus CE that organizes the identities students use most often in Trigonometry, Precalculus, and Calculus into quick-access calculator menus. Less time hunting through notes, more time working through problems.
What's Included
| File Name | Type | What It Does |
|---|---|---|
| TRIGID2 | Reference Program | 40+ trigonometric identities organized in calculator menus. Covers Pythagorean identities, reciprocal and quotient identities, co-function identities, even/odd (negative-angle) identities, sum and difference formulas, double-angle formulas, half-angle formulas, and product-to-sum identities. |
Identity categories included:
- ✅ Pythagorean identities
- ✅ Reciprocal and quotient identities
- ✅ Co-function identities
- ✅ Even/odd (negative-angle) identities
- ✅ Sum and difference formulas
- ✅ Double-angle formulas
- ✅ Half-angle formulas
- ✅ Product-to-sum identities
This is a reference program, not a solver — designed to reduce memorization pressure and make it easier to find the right identity during homework, practice problems, and test prep. Best for: Trigonometry students, Precalculus students, students preparing for Calculus, and anyone who wants a cleaner trig identity reference on their calculator.
Compatible Calculators
✅ TI-84 Plus CE
✅ TI-84 Plus CE Python
✖ Not for TI-83, TI-Nspire, or Casio calculators.
Delivery
Instant digital download. You receive the TRIGID2.8xp file after purchase.
Need the full Precalculus formula set?
TRIGID2 is already included in the Precalculus Equations & Formulas bundle, which also covers conics, logs, sequences and series, trig laws, and more — a complete precalculus reference in two programs.
View Precalculus Bundle →Need help getting started? Complete Install Guide (2026) | Troubleshooting | FAQs
AP® is a registered trademark of the College Board, which was not involved in the production of, and does not endorse, this product.
What do I need to install the program?
What do I need to install the program?
- TI84 Plus CE (or Python) Calculator
- TI Connect CE Software
- Update Your TI calculator software
- USB mini to USB cord (Should have came with your calculator, or you can buy one from Staples or Best Buy)
How do I install the program on my calculator?
How do I install the program on my calculator?
Can you help me with the TI connect software?
Can you help me with the TI connect software?
Yes! Take a look at this guide for the TI Connect CE Software for more help.
