Triangle solver - Trigonify

Trigonify is a focused trigonometry calculator and triangle solver for students, teachers, self-learners, and trades workers who need trig steps without an account, without ads, and without a paywall on the basics.

Solve trigonometry problems, explore the unit circle, graph sine cosine tangent waves, review trig formulas, and practice the skills used in algebra, geometry, trigonometry, and precalculus — all in one offline-friendly trig calculator app.

Trigonometry calculator features:

- Right triangle solver with SOHCAHTOA and the Pythagorean theorem

- Oblique triangle solver with the Law of Sines and Law of Cosines, including the SSA ambiguous case

- Interactive unit circle you can drag, with exact values (π/6, π/4, π/3, π/2) and reference angle overlay

- Sine cosine tangent grapher with live sliders for amplitude, period, phase shift, and vertical shift

- Inverse trigonometry calculator: arcsin, arccos, arctan with domain warnings

- Trig identity verifier with step-by-step simplification

- Word problem templates: angle of elevation, angle of depression, bearing, ladder, shadow, river

- Complex numbers in polar and rectangular form, plus De Moivre and roots of unity

- Vectors with dot product, cross product, magnitude, angle, and projection

- Phase-shift playground: drag the unit circle and the sine wave together to see the link

- Searchable trigonometry formula reference (KaTeX rendered) with favorites

- Solution history and one-tap PDF export of formulas or worked solutions

- Degree, radian, gradian, and DMS angle input — switch unit any time

- Practice drills with streaks, stats, and a mistake log

Built for learning:

- Clear step-by-step trig solutions, not just final answers

- SOHCAHTOA refresher built into the right triangle solver

- Unit circle with exact value fractions, not just decimals

- Sine cosine tangent graphs with live parameter sliders

- Trigonometry formula reference covering Pythagorean, reciprocal, quotient, even/odd, cofunction, sum/difference, double angle, half angle, power reduction, product-to-sum, and law of sines and law of cosines

- Custom math keypad with π, √, fractions, and exponents — no fighting the system keyboard

- Dark mode and light mode with large tap targets for job-site visibility

- Haptic feedback when the unit circle snaps to a special angle

Designed for:

- High school precalculus and trigonometry students

- Algebra 2, geometry, and precalc homework

- SAT and ACT math prep

- College precalculus and engineering math

- Carpenters, surveyors, machinists, and trades workers who need fast triangle math on the job

- Teachers using a scientific calculator and unit circle for classroom demos

- Self-learners returning to math who want a calmer alternative to a cluttered scientific calculator

What makes Trigonify different from a generic trigonometry calculator or triangle solver:

- The diagram stays visible while you type — no keyboard covering the triangle

- Drag the unit circle to see angles, exact values, and reference triangle update live

- Step-by-step trig solutions explain SOHCAHTOA and the law of sines and law of cosines, not just spit out a number

- No forced sign-up, no required account, no email gate

- No banner ads, no interstitial ads, no notification spam

- Imperial, DMS, decimal, and radian input supported for trades workflows

Trigonify is an educational trigonometry calculator and study aid. Always check answers before using them for exams, grading, construction, engineering, financial, or safety-critical work.