Trigonometric vs RadarPlot

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.

Master radar plotting through practical, interactive exercises. RadarPlot is a professional training tool for maritime cadets, deck officers and navigators learning the 6-minute plotting method, relative motion, CPA calculations and collision-avoidance maneuvers. PRACTICE RADAR PLOTTING • Record target range and bearing observations • Plot multiple radar targets • Use a North-Up stabilized radar display • Adjust plotting intervals and range scales • Zoom and pan without affecting calculations CALCULATE CPA AND TARGET MOTION • Automatically construct the Relative Motion Line • Calculate CPA, TCPA and relative speed • Determine the target’s true course and speed • Visualize own-ship and target-motion vectors • Practice the standard 6-minute plotting method PLAN COLLISION-AVOIDANCE MANEUVERS • Set a required minimum passing distance • Calculate course-only and speed-only solutions • Select the maneuver execution point • Display the Advanced Relative Motion Line • Compare alternative maneuvering decisions BUILT FOR MARITIME TRAINING Use built-in scenarios and answer-reveal tools to learn step by step or practise independently. Ideal for maritime academy students, deck officers preparing for examinations, navigators refreshing manual plotting skills and instructors demonstrating relative-motion geometry. Train smarter. Understand the plot. Make safer decisions.