PCT Coach vs Beautiful Trigonometry

PCT Coach: Your Guide to the Patent Cooperation Treaty PCT Coach is an app designed to provide inventors and students with the tools and knowledge they need to confidently navigate the PCT process. Part 1: Filing & Formalities Learn the basics of filing an international application under the PCT, including Articles 4–14 and key rules for document requirements (Rule 11), establishing the filing date (Rule 20), and addressing formalities (Rule 26). Part 2: Role of the ISA Discover how International Searching Authorities (ISAs) operate under Articles 15–19. Dive into the search process, requirements for documentation (Rule 35), and handling unity of invention challenges (Rule 40). Part 3: International Publication Understand how applications are published internationally under Articles 20–21. Learn about publication languages, corrections (Rule 91), and managing the contents (Rule 48). Part 4: National Phase Entry Master the transition from the international to the national phase, guided by Articles 22–27 and Rules 49 and 51. Discover how early processing and other procedural requirements are handled. Part 5: International Preliminary Examination Gain insights into the Chapter II process, including patentability criteria (Article 33), demand requirements (Rule 53), and the International Preliminary Report on Patentability (Rule 70). Part 6: Unity of Invention & Fees Learn about unity of invention rules embedded in Articles 15, 17, and 33. Explore the impact of additional fees under Rules 13, 40, and 68 on both the search and examination phases. Part 7: Restoration of Priority Manage priority claims under Articles 8 and 24. Learn remedies for missed deadlines (Rule 82bis) and corrections of priority claims (Rule 26bis). Part 8: Withdrawal & Amendments Find out how to make amendments under Article 19 and withdraw international applications or demands using Rules 46 and 90bis. Part 9: Roles of WIPO, ROs, ISAs, IPEAs, and IB Discover the responsibilities of key players in the PCT system under Articles 16, 31, and 52, including Rules 93 and 94 governing access to files and the International Bureau’s roles. Part 10: Language, Disputes & Transitional Provisions Learn about language requirements, dispute resolution, and transitional provisions under Articles 44–67, with Rule 92bis guiding applicant detail changes. The design and development of this iOS app, including the preparation of the legal questions, were carried out by Barış ATALAY, an EQE tutor and iOS developer (not professionally). Feedback regarding the legal questions or the app's SwiftUI implementation is welcome. You can reach Baris at atalay@stanadvoka.com.

Trigonometry doesn’t have to be confusing. When my daughter first met sine and cosine in school, she asked, “Why do we even need this?” We tried formulas, practice sheets, even flashcards — but it still felt like memorizing rules without meaning. So I built a way to make it visible. With sliders, color, and motion, she could see how angles and sides connect — how triangles breathe, how waves emerge, and how every formula has a shape behind it. That small experiment became Beautiful Trigonometry — an interactive app that turns math from abstract to intuitive. Instead of memorising, explore. Move a slider, rotate a triangle, or trace the unit circle — and suddenly, sine, cosine, and tangent make sense. You’ll discover how to: - Understand how angles and sides connect - See how triangles and graphs reflect each other - Build intuition with the unit circle - Learn faster using animations and instant feedback Free to explore: - Acute Angle Trigonometry: sine, cosine, and tangent made visual - Full Circle Functions: understand sine and cosine across 360° - Triangle Area: learn the sine area formula interactively - Law of Cosines: see it work step by step Upgrade to PRO and unlock: - Graphs of all trig functions: sine, cosine, tangent, cotangent, secant, cosecant - Trig Identities & Formulas: a complete reference Perfect for - Students who want trigonometry to finally click - Teachers and tutors explaining visually - Anyone who loves learning through discovery You won’t just study trigonometry — you’ll feel it click. Part of the Beautiful Math series. Learn visually. Understand deeply. Move ahead.