Trigonometric unit circle
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Recommended for pupils and students.
Visual understanding and calculating sine, cosine, tangent, cotangent, secant and cosecant function, degrees and radians.
Move point to define angle and functions.
Tap circle center to determine the exact angle you want.
Use options to show what you want.
Restructured options: showed modes, hided options.
Add localization for option texts.
Fixed some visual bugs.
Add choose angle circle to cartesian projection