Trigonometry:Guess sin or cos?
??? (30°) = 0.5..., specify if ??? is which trigonometric operation : sin or cos!
20 equations would show during the game, counting the total time used.
Time limit currently is 1200 seconds.
If specifying incorrectly or the app is put into the background, then player loses, and result is not counted.
There are 3 modes:
0° - 90°
0° - 180°
0° - 360°

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