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About
Trig Formula is an offline trigonometry review tool designed for high school students and self learners. It focuses on common test topics such as trigonometric values, reduction formulas, the unit circle, and radian-degree conversion. No login, internet connection, account registration, cloud sync, social features, or personal data collection is required. Core features include quick lookup for common trigonometric formulas, organized by angle, radian, quadrant, and topic; visual unit circle practice for memorizing special-angle values; step-by-step reduction formula drills with accuracy and mistake tracking; radian-degree conversion and quadrant judgment exercises; and a local mistake book with mastery statistics stored only on your device.
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