Trigonometry Formulas puts 290+ trigonometry formulas in your pocket – trig ratios, the standard angles table, trigonometric identities, compound, double and half angle formulas, inverse trigonometry, sine and cosine rules, heights and distances, graphs, equations and the calculus of trig functions – and every formula comes with a worked example. It is a complete trigonometry formula app that works offline, so you can revise anywhere.
Each formula page shows the formula in clear maths notation, what every letter means, the conditions you must not forget (domains, principal values, quadrant signs) and a step-by-step worked example with the answer. Triangles, the unit circle, ASTC and the graphs of all six functions come with labelled figures.
NEW IN 4.0.0
A completely new Trigonometry app: 290+ formulas in 20 topics (the old app had about 100 formula lines on a few pages), a worked example for every formula, 550+ practice questions with explanations, 25 labelled figures and graphs, search, saved formulas, flashcards, Formula of the Day and a new design with dark mode.
20 TOPICS
• Basics: Angles & Measurement (degrees, radians, arc length), Trigonometric Ratios, Standard Angles (0° to 360°, 15°, 18°, 22.5°, 36°), Allied Angles & ASTC
• Trigonometric identities: Fundamental Identities, Compound Angles, Multiple Angles (double and triple angle formulas), Half Angles & Power Reduction, Product–Sum Formulas, Conditional Identities
• Graphs & equations: Trigonometric Graphs (period, amplitude, phase shift), Trigonometric Equations (general solutions)
• Inverse Trigonometry: domains, principal values and all the identities with their conditions
• Triangles: Properties of Triangles (sine rule, cosine rule, projection formulas, half-angle formulas in terms of sides, area), Circles of a Triangle (circumradius, inradius, exradii), Heights & Distances
• Higher trigonometry: Hyperbolic Functions, Complex Numbers & De Moivre, Series & Limits (sin x / x), Calculus of Trig Functions (derivatives and integrals)
PRACTISE WHAT YOU LEARN
• Quiz by topic or mixed – formula questions and “Which formula is this?”, with an explanation after every answer
• Formula Challenge: 10 timed rounds
• Exam Mode: 50 questions in 25 minutes, answers at the end
• My Mistakes: every wrong answer comes back until you get it right
• Save any formula with ☆ and revise it with spaced-repetition flashcards
DAILY HABIT
Formula of the Day every morning and a short revision formula in the evening, a daily goal, streaks, badges and progress for every topic – including your weakest topic.
MORE
• 100% offline trigonometry formulas: no internet needed to study
• Search any formula: “sin 2A”, “cosine rule”, “tan inverse”, “angle of elevation” – Hindi words like “unnayan kon” work too
• Listen to a formula read aloud
• Share a formula as a picture with your study group
• Dark mode
• Watch one short video to use the app ad-free for 15 minutes
For school and college students, teachers and anyone preparing for entrance and competitive exams who needs the right trigonometry formula fast. Learn trigonometric identities, trig ratios and inverse trigonometry with examples – free and offline.
