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.