Trigonometric vs Touch Trigonometry

Learn trigonometry by seeing it move. Trigonometric turns every formula into something you can drag, spin and explore — free, with no ads, no accounts and no internet needed. UNIT CIRCLE • Drag point A round the circle or use the slider and play button • Change the radius OA and read x = OA·cos θ, y = OA·sin θ, arc length AB, circumference and sector area • Exact values such as √3/2, angles in degrees and as multiples of π, quadrant signs (All–Sin–Tan–Cos) and the tangent line 3D SPHERE — SPHERICAL COORDINATES • Place a point P(r, θ, φ) on a glass sphere you turn with your finger • See it converted to x, y, z and back, with top and side views • Explore the volume element r² sin θ dr dθ dφ GRAPHS • A rotating circle draws sin, cos and tan, projected straight onto the curve • Reshape y = A·f(Bx + C) + D with sliders and read amplitude, period, phase shift and midline • Type your own formula — or try examples like a Fourier square wave, a damped wave or beats TRIANGLE SOLVER • Solve any triangle from three values: SSS, SAS, ASA/AAS and the ambiguous SSA case • Drawn to scale, with area, perimeter and every step of the working FORMULAS & QUIZ • A searchable cheat sheet of identities, the laws of sines and cosines and the special-angle table • Quick ten-question quizzes with an explanation after every answer Three colour themes, full iPad support and a side-by-side landscape layout. Made for students, teachers and anyone curious about trigonometry.

Finally understand trigonometry. Touch Trigonometry is the most intuitive way to learn the trigonometric functions. Instead of memorizing formulas, you'll see how sin, cos, tan, and the rest actually work—by touching and exploring a live unit circle and graph. Drag your finger around the circle and watch trig functions respond in real time. You'll be amazed at how quickly the "true meaning" of trigonometry becomes clear. Watch the graph on the right trace their values. In seconds, concepts that confused you for years will suddenly click. This app is great for students struggling with trigonometry or anyone looking for a refresher. HOW IT WORKS On the left: an interactive unit circle. Touch anywhere and drag to change the angle θ (theta). A triangle forms showing the relationships between the angle and the trig values. On the right: live graphs of all six trig functions. As you move the angle, dots trace along each curve showing the current value. Touch the graph side to control the angle from there too. It's bidirectional, immediate, and intuitive. No tutorial needed—just touch and explore. Users have told us that they never understood *why* the trig functions existed—until they used this app. From students to the math curious, Touch Trigonometry offers a truly intuitive way to understand one of the trickiest parts of geometry—at your fingertips! FEATURES • Interactive unit circle with touch control • All 6 trig functions: sin, cos, tan, sec, csc, cot • Live function graphs with real-time value tracking • Bidirectional control (circle or graph) • Right triangle overlay showing opposite/adjacent/hypotenuse • Reference angle markers (30°, 45°, 60°, 90°, etc.) • Switch between degrees and radians • Snap-to-reference-angles mode • Pinch to zoom the graph • Colorblind-friendly color palette • Clean dark theme, no distractions • No ads, no account required WHO IT'S FOR • High school & college students learning trig • Teachers demonstrating concepts in class • Engineers & scientists refreshing fundamentals • Anyone who was told to "just memorize SOHCAHTOA" • Visual learners who need to see it to get it FREE FEATURES • Full unit circle interaction • Sine visualization • Triangle overlay • Degree/radian switching • All UI customization options UNLOCK EVERYTHING (One-Time Purchase) • One-time purchase for lifetime access to all paid features • Cosine, tangent, secant, cosecant, cotangent • All future paid features